Battle of Britain Day
Encyclopedia
The Battle of Britain Day is the name given to the large-scale aerial battle that took place on 15 September 1940, during the Battle of Britain
Battle of Britain
The Battle of Britain is the name given to the World War II air campaign waged by the German Air Force against the United Kingdom during the summer and autumn of 1940...

 (German: Luftschlacht um England or Luftschlacht um Großbritannien).

In June 1940, Nazi Germany
Nazi Germany
Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...

 had conquered most of Western Europe
Western Europe
Western Europe is a loose term for the collection of countries in the western most region of the European continents, though this definition is context-dependent and carries cultural and political connotations. One definition describes Western Europe as a geographic entity—the region lying in the...

 and Scandinavia
Scandinavia
Scandinavia is a cultural, historical and ethno-linguistic region in northern Europe that includes the three kingdoms of Denmark, Norway and Sweden, characterized by their common ethno-cultural heritage and language. Modern Norway and Sweden proper are situated on the Scandinavian Peninsula,...

. At that time, the only other major power standing in the way of a German dominated Europe was the British Empire
British Empire
The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom. It originated with the overseas colonies and trading posts established by England in the late 16th and early 17th centuries. At its height, it was the...

 and the Commonwealth. After having several peace offers rejected by the British, Adolf Hitler
Adolf Hitler
Adolf Hitler was an Austrian-born German politician and the leader of the National Socialist German Workers Party , commonly referred to as the Nazi Party). He was Chancellor of Germany from 1933 to 1945, and head of state from 1934 to 1945...

 ordered the Luftwaffe
Luftwaffe
Luftwaffe is a generic German term for an air force. It is also the official name for two of the four historic German air forces, the Wehrmacht air arm founded in 1935 and disbanded in 1946; and the current Bundeswehr air arm founded in 1956....

to destroy the Royal Air Force
Royal Air Force
The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

 (RAF) in order to gain air superiority or air supremacy
Air supremacy
Air supremacy is the complete dominance of the air power of one side's air forces over the other side's, during a military campaign. It is the most favorable state of control of the air...

 as a prelude to launching Operation Sea Lion, an amphibious assault by the Wehrmacht
Wehrmacht
The Wehrmacht – from , to defend and , the might/power) were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the Heer , the Kriegsmarine and the Luftwaffe .-Origin and use of the term:...

(German armed forces) onto the British mainland.

In July 1940, the Luftwaffe started by closing the English Channel
English Channel
The English Channel , often referred to simply as the Channel, is an arm of the Atlantic Ocean that separates southern England from northern France, and joins the North Sea to the Atlantic. It is about long and varies in width from at its widest to in the Strait of Dover...

 to merchant shipping. In August, Operation Adlerangriff (Eagle Attack) was launched against RAF airfields in southern England. By the first week of September, the Luftwaffe had not gained the results desired by Hitler. Frustrated, the Germans turned towards the strategic bombing
Strategic bombing
Strategic bombing is a military strategy used in a total war with the goal of defeating an enemy nation-state by destroying its economic ability and public will to wage war rather than destroying its land or naval forces...

 of cities, an offensive which was aimed at British military and civil industries, but also civilian morale. The attacks began on 7 September 1940, but it was to reach its daylight climax on 15 September.

On Sunday, 15 September 1940, the Luftwaffe launched its largest and most concentrated attack against London
London
London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 in the hope of drawing out the RAF into a battle of annihilation. Around 1,500 aircraft took part in the air battles which lasted until dusk. The action was the climax of the Battle of Britain.

RAF Fighter Command
RAF Fighter Command
RAF Fighter Command was one of three functional commands of the Royal Air Force. It was formed in 1936 to allow more specialised control of fighter aircraft. It served throughout the Second World War, gaining recognition in the Battle of Britain. The Command continued until 17 November 1943, when...

 defeated the German raids. The Luftwaffe formations were dispersed by a large cloud base and failed to inflict severe damage on the city of London. In the aftermath of the raid, Hitler postponed Operation Sea Lion. Having been defeated in daylight, the Luftwaffe turned its attention to The Blitz
The Blitz
The Blitz was the sustained strategic bombing of Britain by Nazi Germany between 7 September 1940 and 10 May 1941, during the Second World War. The city of London was bombed by the Luftwaffe for 76 consecutive nights and many towns and cities across the country followed...

 night campaign which lasted until May 1941.

The 15th of September, also known as Battle of Britain Day, is now an annual commemoration of the battle in the United Kingdom. In Canada, the commemoration takes place on the third Sunday of September.

Background

The Battle of Britain began on 10 July 1940, when the first Luftwaffe bomber fleets began attacking convoys and Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 forces in English
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 ports and Channel
English Channel
The English Channel , often referred to simply as the Channel, is an arm of the Atlantic Ocean that separates southern England from northern France, and joins the North Sea to the Atlantic. It is about long and varies in width from at its widest to in the Strait of Dover...

. The results were positive and the Germans succeeded in forcing the British to abandon the channel convoy route and to redirect shipping to ports in north-eastern Britain. With this achieved the Luftwaffe began the second phase of its air offensive, attacking RAF airfields and supporting structures on the British mainland. The codename of the offensive was Unternehmen Adlerangriff ("Operation Eagle Attack"). On 12 August, it flew its first missions in this regard. On 13 August, the Luftwaffe carried out its largest attack to date on the mainland. Christened Adlertag ("Eagle Day"), the attack was a failure. Nevertheless, the raids continued, at great cost to both sides. The impact of the German offensive on RAF airfields and Fighter Command is disputed. Some historians believe that the attacks were not having much effect and that the Germans were losing the attrition battle, while others believe the RAF was faltering.

Either way, Hitler was dissatisfied with the progress being made. Prompted by an RAF raid on Berlin in late August 1940, he ordered the Luftwaffe to concentrate its attacks upon London
London
London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

. It was thought the move would draw RAF Fighter Command up into a large, decisive battle. Initially, the change in strategy caught the British off-guard. The first daylight attack of this type occurred on 7 September and caused extensive damage and civilian casualties. Some 107400 LT (109,123.8 t) of shipping was damaged in the Thames Estuary
Thames Estuary
The Thames Mouth is the estuary in which the River Thames meets the waters of the North Sea.It is not easy to define the limits of the estuary, although physically the head of Sea Reach, near Canvey Island on the Essex shore is probably the western boundary...

 and 1,600 civilians were killed or injured. Still, Hitler was critical of the Luftwaffe and its failure to destroy Fighter Command quickly. He dismissed over-optimistic reports from the Oberkommando der Luftwaffe
Oberkommando der Luftwaffe
The Oberkommando der Luftwaffe was the air force High Command of the Third Reich.Air Force Commanders-in-Chief* Reich Marshal Hermann Göring * Field Marshal Robert Ritter von Greim -History:...

(OKL or High Command of the Air Force), particularly the Chief of the Luftwaffe general staff Hans Jeschonnek
Hans Jeschonnek
Hans Jeschonnek was a German Generaloberst and a Chief of the General Staff of Nazi Germany′s Luftwaffe during World War II. He committed suicide in August 1943.-Biography:...

, who asserted the RAF was on its last legs. Confident the RAF was nearly defeated, Jeschonnek requested terror bombing to be enacted as a final blow. Hitler refused, and only allowed attacks on industry, communications and public utility targets.

Over the next few days, bad weather prevented more large attacks. On 9 and 11 September, only smaller raids were carried out. It gave Hugh Dowding AOC (Air Officer Commanding) Fighter Command, the chance to prepare and reinforce his forces. The British, possibly through the use of Ultra intelligence, recognised the German change in strategy and duly prepared for further attacks on the capital. ULTRA's contribution to the preparations for 15 September is also disputed. The intelligence from ULTRA at this stage in the war tended to be fragmented. With the Germans launching attacks whenever there was clear weather, it would not have been difficult for RAF Fighter Command to have predicted an attack on 15 September, which was to be a clear day.

Rationale

On the afternoon of 14 September, Hitler and his command held a conference at the Reich Chancellery
Reich Chancellery
The Reich Chancellery was the traditional name of the office of the Chancellor of Germany in the period of the German Reich from 1871 to 1945...

 in Berlin to discuss the future direction of the war. Göring was not present. Instead, he was inspecting Luftwaffe units in Belgium. Erhard Milch
Erhard Milch
Erhard Milch was a German Field Marshal who oversaw the development of the Luftwaffe as part of the re-armament of Germany following World War I, and served as founding Director of Deutsche Luft Hansa...

 replaced him. Hitler praised the attacks which had caused heavy damage to the RAF and London. He blamed the failure to achieve more decisive results on the weather. Nevertheless, it was clear to Hitler that victory had still not been attained by the Luftwaffe. Under those circumstances, Operation Sea Lion could not take place. Großadmiral Erich Raeder
Erich Raeder
Erich Johann Albert Raeder was a naval leader in Germany before and during World War II. Raeder attained the highest possible naval rank—that of Großadmiral — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz...

, commander-in-chief of the Kriegsmarine
Kriegsmarine
The Kriegsmarine was the name of the German Navy during the Nazi regime . It superseded the Kaiserliche Marine of World War I and the post-war Reichsmarine. The Kriegsmarine was one of three official branches of the Wehrmacht, the unified armed forces of Nazi Germany.The Kriegsmarine grew rapidly...

, agreed. He argued that Sea Lion should only be carried out as a last resort regardless of gaining air superiority.

Hitler wanted to maintain the threat of invasion by continuing air attacks on military targets in the British capital. Hans Jeschonnek still pushed for attacks on civilian morale. He argued that military and civilian industries were located too far apart to achieve a collapse of morale by attacking the former. Instead, he pressed for attacks against residential areas. Hitler refused. He ordered that only military targets in London were to be attacked.

The Luftwaffe intimated that a period of good weather was now due over France, Belgium and southern Britain. They prepared for an attack along the lines set by Hitler. Staff officers of Luftflotte 2
Luftflotte 2
Luftflotte 2 was one of the primary divisions of the German Luftwaffe in World War II. It was formed February 1, 1939 in Braunschweig and transferred to Italy on November 15, 1941...

 based in Brussels
Brussels
Brussels , officially the Brussels Region or Brussels-Capital Region , is the capital of Belgium and the de facto capital of the European Union...

 began planning for a two-pronged offensive on 15 September.

Targets

The targets were purely military. The first target selected was the Battersea railway station (WLER) West London Extension Railway
West London Line
The West London Line is a short railway in inner West London which links lines at in the south to lines near Willesden Junction in the north. It has always been an important cross-London link especially for freight services...

 in Battersea
Battersea
Battersea is an area of the London Borough of Wandsworth, England. It is an inner-city district of South London, situated on the south side of the River Thames, 2.9 miles south-west of Charing Cross. Battersea spans from Fairfield in the west to Queenstown in the east...

 district. The tracks were 12 abreast in some places and linked London to the heavy industries of the West Midlands
West Midlands (region)
The West Midlands is an official region of England, covering the western half of the area traditionally known as the Midlands. It contains the second most populous British city, Birmingham, and the larger West Midlands conurbation, which includes the city of Wolverhampton and large towns of Dudley,...

 and other industrial cities on the north and south-east of Britain. The conglomeration of lines included rail-over-rail bridges which were vulnerable to air attack. This was what air planners referred to as "choke points", which if cut could erode enemy communication efficiency.

The second target, for the larger second attack during the afternoon would be the dock areas of the Thames Estuary
Thames Estuary
The Thames Mouth is the estuary in which the River Thames meets the waters of the North Sea.It is not easy to define the limits of the estuary, although physically the head of Sea Reach, near Canvey Island on the Essex shore is probably the western boundary...

 including the warehouse of the East End of London
East End of London
The East End of London, also known simply as the East End, is the area of London, England, United Kingdom, east of the medieval walled City of London and north of the River Thames. Although not defined by universally accepted formal boundaries, the River Lea can be considered another boundary...

, Surrey Commercial Docks
Surrey Commercial Docks
The Surrey Commercial Docks were a large group of docks in Rotherhithe on the south bank of the Thames in South East London. The docks operated in one form or another from 1696 to 1969...

, south of the river, and Royal Docks
Royal Docks
The Royal Docks comprise three docks in east London - the Royal Albert Dock, the Royal Victoria Dock and the King George V Dock. They are more correctly called the Royal Group of Docks to distinguish them from the Royal Dockyards, Royal being due to their naming after royal personages rather than...

 (Royal Victoria Dock
Royal Victoria Dock
The Royal Victoria Dock is the largest of three docks in the Royal Docks of east London, now part of the redeveloped Docklands.-History:...

, West India Docks
West India Docks
The West India Docks are a series of three docks on the Isle of Dogs in London, the first of which opened in 1802. The docks closed to commercial traffic in 1980 and the Canary Wharf development was built on the site.-History:...

, Royal Albert Dock
Royal Albert Dock
The Royal Albert Dock is one of three docks in the Royal Group of Docks of east London, now part of the redeveloped Docklands.-History:The dock was constructed to the east of the earlier Victoria Dock by the St Katharine and London dock companies and opened in 1880...

 and King George V Dock).

Intelligence

The strategy could only be valid if intelligence assessments were correct. To German 'intelligence', it seemed as if the RAF might be on the verge of collapse. The attacks on London, thus far, seemed to confirm the assumption. None of the Luftwaffe bomber formations had encountered the well organised, effective and ferocious defence that had characterised the battles in August 1940. If the German intelligence was correct, then by striking against vital choke points in London that the RAF would be forced to defend, the Luftwaffe had the opportunity to destroy the remaining RAF fighter forces. Not only would the attacks allow for the attainment of air superiority, they would eliminate a vital rail network, destroy shipping and supplies brought in from North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

, and affect civilian morale by demonstrating London’s vulnerability to air power.

The policy of attacking London after the successful 7 September raid quickly became counter-productive, and in this matter the Luftwaffe suffered from serious misjudgement resulting from their intelligence service. The crews had been told the RAF was down to its last reserves and that one more assault would clinch victory. This was incorrect which meant bomber crews would be in for a shock on 15 September. The RAF had been given much needed rest after intense operations by the shift in German strategy. British radar, having been virtually untouched, was still able to follow the slow German build ups over France long before the first German aircraft reached British airspace. It would give the rested Fighter Command units plenty of warning. Moreover, by choosing to attack London, it exposed the bombers to greater danger by forcing them to fly greater distances in hostile air space. German crews would be forced to fight all the way to London and back. As it happened, all the German bomber units were at least intercepted on 15 September, and were then scattered as they withdrew.

Hitler was satisfied. The reasoning of the Luftwaffe seemed sound. Should the bombing achieve its aim, it offered considerable strategic value. The strike against London meant that most of the fighting on 15 September would take place between Luftflotte 2 under Albert Kesselring
Albert Kesselring
Albert Kesselring was a German Luftwaffe Generalfeldmarschall during World War II. In a military career that spanned both World Wars, Kesselring became one of Nazi Germany's most skilful commanders, being one of 27 soldiers awarded the Knight's Cross of the Iron Cross with Oak Leaves, Swords...

 and Keith Park
Keith Park
Air Chief Marshal Sir Keith Rodney Park GCB, KBE, MC & Bar, DFC, RAF was a New Zealand soldier, First World War flying ace and Second World War Royal Air Force commander...

’s No. 11 Group RAF
No. 11 Group RAF
No. 11 Group was a group in the Royal Air Force for various periods in the 20th century, finally disbanding in 1996. Its most famous service was during 1940 when it defended London and the south-east against the attacks of the Luftwaffe during the Battle of Britain.-First World War:No. 11 Group was...

.

British strategy

There was a debate which raged within Fighter Command during the Battle of Britain. It centred around what strategy to pursue against the Luftwaffe. AOC Hugh Dowding and AOC 11 Group
No. 11 Group RAF
No. 11 Group was a group in the Royal Air Force for various periods in the 20th century, finally disbanding in 1996. Its most famous service was during 1940 when it defended London and the south-east against the attacks of the Luftwaffe during the Battle of Britain.-First World War:No. 11 Group was...

 Keith Park
Keith Park
Air Chief Marshal Sir Keith Rodney Park GCB, KBE, MC & Bar, DFC, RAF was a New Zealand soldier, First World War flying ace and Second World War Royal Air Force commander...

 favoured a strategy of non-attrition. From their perspective, the RAF had to remain intact to win the battle, rather than decimate the Luftwaffe. Both felt that trying to fight a battle of attrition would give the numerically superior enemy the chance to destroy large parts of the Command in one go, thus playing into Göring's hands. Therefore Park and Dowding advocated the tactic of sending small numbers of fighters to intercept every raid; providing opposition to every raid offered the chance of inflicting continued attrition on German formations while avoiding decisive damage to Fighter Command.

Park's equivalent and another of Dowding's commanders, AOC 12 Group
No. 12 Group RAF
No. 12 Group of the Royal Air Force was a command organization that exisited over two separate periods, namely the end of World War I when it had a training function and from just prior to World War II until the early 1960s when it was tasked with an air defence role.No. 12 Group was first formed...

 Trafford Leigh-Mallory
Trafford Leigh-Mallory
Air Chief Marshal Sir Trafford Leigh-Mallory KCB, DSO & Bar was a senior commander in the Royal Air Force. Leigh-Mallory served as a Royal Flying Corps pilot and squadron commander during World War I...

, held the opposite view. For him, large forces would win the battle by destroying large numbers of the enemy. This attrition strategy would use the concept of the Big Wing
Big Wing
The Big Wing, also known as a Balbo, was an air fighting tactic proposed during the Battle of Britain by 12 Group commander Air Vice-Marshal Trafford Leigh-Mallory and Acting Squadron Leader Douglas Bader. In essence, the tactic involved meeting incoming Luftwaffe bombing raids in strength with a...

 as its basis.

The Big Wing

Group Captain
Group Captain
Group captain is a senior commissioned rank in the Royal Air Force and the air forces of many other Commonwealth countries. It ranks above wing commander and immediately below air commodore...

 Trafford Leigh-Mallory and Squadron Leader
Squadron Leader
Squadron Leader is a commissioned rank in the Royal Air Force and the air forces of many countries which have historical British influence. It is also sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure. In these...

 Douglas Bader
Douglas Bader
Group Captain Sir Douglas Robert Steuart Bader CBE, DSO & Bar, DFC & Bar, FRAeS, DL was a Royal Air Force fighter ace during the Second World War. He was credited with 20 aerial victories, four shared victories, six probables, one shared probable and 11 enemy aircraft damaged.Bader joined the...

 came to play significant roles in the September fighting. Bader commanded 242 Squadron
No. 242 Squadron RAF
No. 242 Squadron RAF was a Royal Air Force squadron. It flew in many roles during its active service and it is also known for being the first squadron Douglas Bader commanded.-In World War I:No...

 flying Hurricanes
Hawker Hurricane
The Hawker Hurricane is a British single-seat fighter aircraft that was designed and predominantly built by Hawker Aircraft Ltd for the Royal Air Force...

 in Leigh-Mallory's 12 Group, which defended the vital industrial targets in the West Midlands
West Midlands (county)
The West Midlands is a metropolitan county in western central England with a 2009 estimated population of 2,638,700. It came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972, formed from parts of Staffordshire, Worcestershire and Warwickshire. The...

. A source of frustration to Leigh-Mallory was the way in which his squadrons were used. During Luftwaffe attacks on south-east England 12 Group units were tasked with protecting 11 Group sector stations north of the Thames Estuary, while Leigh-Mallory believed his units should be in action south of the Thames. Mallory also criticised the way Park and Dowding were conducting the battle. The popular image of outnumbered Spitfires and Hurricanes meeting an enemy with huge numerical strength preyed upon his mind. He favoured a reverse of the image.

Bader was bored and frustrated at being left out of the major actions in the south. To Bader, it did not make sense for 12 Group to apparently sit idle while 11 Group suffered heavy losses and fought at a numerical disadvantage. Bader advocated scrambling 12 Group fighters as soon as German aircraft were detected forming up over France or Belgium. He asserted 12 Group was quick enough to reach 20000 ft (6,096 m) over the Thames Estuary before the enemy reached the area. He planned to use large forces, three to five squadrons to engage the enemy. Should this succeed, 11 Group, following up attacks, might have found broken enemy formations whose crews had lost the determination to press on to their targets. Bader implied that this may reduce the losses of fighter pilots in 11 Group. After the war, Bader insisted that both he and Leigh-Mallory wanted the Big Wing tactic enacted in 12 Group only. They both believed, according to Bader, that it was impractical to use in 11 Group as the command was located too close to the enemy and would not have enough time to assemble.

Dowding saw 12 Group as the protector of the Midlands and a reserve for 11 Group. Mallory and Bader wanted to ignore both the defence of the Midlands and keeping a reserve in order to commit 12 Group to battle. In essence, they proposed the opposite of Dowding and resolved to commit the reserves before the front-line units. While this method may have spared 11 Group, it had its problems. Although Mallory and Bader wanted to stop the enemy before it hit RAF airfields, the amount of time it took to position large formations for interception meant that the Big Wing often failed to achieve this. Instead, they engaged the enemy as he withdrew. Prompted by a supporting comment from Sholto Douglas
Sholto Douglas
Sholto Douglas was the mythical Progenitor of Clan Douglas, a powerful and warlike family in Medieval Scotland.A Mythical battle took place: "in 767, between King Solvathius rightful king of Scotland and a pretender Donald Bane...

, to the effect that it did not matter when an interception was made, as long as it accounted for a large number of enemy aircraft, Bader announced that he would rather destroy 50 German bombers after hitting their targets than 10 before. The argument was strong; crippling losses would act as a deterrent, so that damage sustained on an occasion when the Germans did get through would have to be offset against later occasions when they did not even care to try.

The counter-arguments were much stronger. The assumption that the Germans would be put off by losses was wrong; it would have taken severe losses for the OKL to change its mind on target selection. The targets were also vital. The airfields themselves supported the squadrons in the field, while the loss of the vital sector-stations could well have crippled the defence system. Thus the possibility of allowing the bulk of the German bombers to reach their target unscathed was unacceptable. The idea that the Big Wing could inflict heavier losses than had been achieved up until then was based on an over-estimate of the numbers of aircraft shot down by the Big Wing. Leigh-Mallory, Sholto Douglas and Bader had based their opinions on claims made by RAF units in battle. However, particularly when a large number of aircraft were engaged, it was possible for the same aircraft to be claimed by more than one pilot. As a result the RAF claimed 100 or more German aircraft shot down in one day on five occasions, while analysis of Luftwaffe losses has shown that there were only four occasions on which the Luftwaffe lost more than 50 aircraft, and never did they lose 100 or more in a day. Nevertheless, while it is not known whether Mallory and Bader were aware that the claims of the RAF and Big Wings were exaggerated, they certainly tried to use them as a potent tool with which to remove Park and Dowding from command and pursue the Big Wing tactic.

Non-attrition

Keith Park, with endorsement from Dowding, opted for the opposite strategy. Park maintained that it was unimportant to inflict large losses on the Germans in comparison to safeguarding his own forces. Park believed the Germans would give up if they could not achieve their aim of air superiority. This, simply put, meant avoiding the destruction and or depletion of Fighter Command was the primary factor in air defence. This would be achieved by sending small numbers of fighters to intercept, minimising losses in the air. By remaining to offer undiminished and constant air opposition, the RAF ensured the Luftwaffe could not win. As long as some sort of cost was imposed before the enemy dropped his bombs and impaired the defence system, the RAF could remain intact to meet the threat again the next day. To this end, Park favoured the 10 bomber kills before the attack, rather than the 50 shot down after it. The strategy suggested an enemy would give up if he felt he was getting nowhere. For even while his losses remained moderate, it would be senseless to suffer those casualties for no return. Park and Dowding's strategy, under the circumstances, was the wiser choice.

Luftwaffe forces

The Luftwaffe had suffered heavy attrition since the opening of the Battle of Britain. Just over a month earlier, it possessed 2,226 operational aircraft on 17 August. By 7 September, it had 1,895 aircraft, a drop of 15 percent. Still, most of the losses were being made good by production. During the battle, the Luftwaffe had undergone a major reorganisation. Luftflotte 5
Luftflotte 5
Luftflotte 5 was one of the primary divisions of the German Luftwaffe in World War II. It was formed 12 April 1940 in Hamburg for the invasion of Norway....

 in Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 had sent most of its Messerschmitt Bf 110
Messerschmitt Bf 110
The Messerschmitt Bf 110, often called Me 110, was a twin-engine heavy fighter in the service of the Luftwaffe during World War II. Hermann Göring was a proponent of the Bf 110, and nicknamed it his Eisenseiten...

 and medium bomber
Medium bomber
A medium bomber is a bomber aircraft designed to operate with medium bombloads over medium distances; the name serves to distinguish them from the larger heavy bombers and smaller light bombers...

 units (Kampfgeschwader
Kampfgeschwader
Kampfgeschwader were specialized bomber units in the Luftstreitkräfte during World War I and the Luftwaffe during World War II.- In World War I :...

or Bomber Wings) to Luftflotte 2 and 3
Luftflotte 3
Luftflotte 3 was one of the primary divisions of the German Luftwaffe in World War II. It was formed on February 1, 1939 from Luftwaffengruppenkommando 3 in Munich and redesignated Luftwaffenkommando West on September 26, 1944...

. Luftflotte 3 then passed most of its Messerschmitt Bf 109
Messerschmitt Bf 109
The Messerschmitt Bf 109, often called Me 109, was a German World War II fighter aircraft designed by Willy Messerschmitt and Robert Lusser during the early to mid 1930s...

 units to Luftflotte 2 which was based in the Netherlands
Netherlands
The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

, Belgium and France.

According to the Luftwaffe order of battle
Order of battle
In modern use, the order of battle is the identification, command structure, strength, and disposition of personnel, equipment, and units of an armed force participating in field operations. Various abbreviations are in use, including OOB, O/B, or OB, while ORBAT remains the most common in the...

 dated 7 September, the nearest date covered by the list, the three Air Fleets contained 1,895 aircraft. Luftflotte 2 had 1,311 machines including; 533 Bf 109s, 107 Bf 110s, 51 reconnaissance and 484 medium bomber aircraft. A further 120 Junkers Ju 87
Junkers Ju 87
The Junkers Ju 87 or Stuka was a two-man German ground-attack aircraft...

 dive bombers were on the order of battle, but were not used.

Luftwaffe readiness was less than ideal. In August, 211 pilots had been killed, including 105 fighter pilots and 91 bomber pilots. Missing pilots amounted to 132 fighter and 94 bomber pilots alone, with a further respective loss of 47 and 28 wounded. The effect on operational ready crews was significant. Messerschmitt Bf 110 units had 60% of crews against unauthorised strength. For bomber units, it was 65%, while Bf 109 units had 81% of crews ready, a 5% increase from the 76% level in the first week of September. However, by 14 September, Bf 109 units possessed only 67% of crews against authorised aircraft. In Bf 110 units, it fell to just 46%, and in bomber units it dropped to 59%. One week later, the figures were 64, 52 and 52% respectively.

RAF forces

In the six weeks of intensive combat, RAF strength had been maintained to extent far greater than the Luftwaffe intelligence had believed possible. On the evening of 14 September, Fighter Command could muster 269 Supermarine Spitfire
Supermarine Spitfire
The Supermarine Spitfire is a British single-seat fighter aircraft that was used by the Royal Air Force and many other Allied countries throughout the Second World War. The Spitfire continued to be used as a front line fighter and in secondary roles into the 1950s...

 and 533 Hawker Hurricane
Hawker Hurricane
The Hawker Hurricane is a British single-seat fighter aircraft that was designed and predominantly built by Hawker Aircraft Ltd for the Royal Air Force...

 fighters. The two vital groups could put up just over 500 fighters. No. 11 Group RAF
No. 11 Group RAF
No. 11 Group was a group in the Royal Air Force for various periods in the 20th century, finally disbanding in 1996. Its most famous service was during 1940 when it defended London and the south-east against the attacks of the Luftwaffe during the Battle of Britain.-First World War:No. 11 Group was...

 had 310 fighters, including 92 Spitfires and 218 Hurricanes. No. 12 Group RAF
No. 12 Group RAF
No. 12 Group of the Royal Air Force was a command organization that exisited over two separate periods, namely the end of World War I when it had a training function and from just prior to World War II until the early 1960s when it was tasked with an air defence role.No. 12 Group was first formed...

 could field 85 Spitfires and 109 Hurricanes. Should No. 10 Group RAF
No. 10 Group RAF
No. 10 Group of the Royal Air Force was formed on 1 April 1918 in No. 2 Area. On 8 May of the next year it was transferred to South-Western Area. In 1919 it was transferred to Coastal Area where it remained until it was disbanded on 18 January 1932....

 come into the battle, a further 48 Spitfires and 78 Hurricanes could be committed. Compared with 17 August, there were just 22 fewer Spitfires and Hurricanes.

During the battle, the RAF had suffered a serious loss of experienced pilots. In mid-September, Fighter Command could call upon 1,492 operational pilots against an establishment of 1,662 — a deficiency of 10%. Many of the pilots were ineffective unless led into battle by experienced men. Air Chief Marshal Hugh Dowding's policy was to move in fresh squadrons from quieter areas to replace losses as the units in the south-east as they became exhausted. By early September, the system was breaking down as squadrons were becoming depleted before fresh units could be formed and take their place.

Reluctantly, Dowding defined three categories, A, B and C. Category A units were to bear the brunt of the fighting, and were to be kept at full strength in aircraft and pilots. Only if the A units suffered exceptionally high losses would they be replaced. B units were relief units, to be maintained at operational strength and only used if absolutely necessary. C units were generally stripped down to just five or six pilots. These units were devoted to training new pilots. Although not fit for fighter-fighter action, they could defend quieter areas. The system potentially could have had fatal results for Fighter Command, with C units becoming less and less effective. But the system had not been running long enough by 14 September for it to have a serious impact on Fighter Command's strength. The replacement units were sufficient in number and effectiveness to continue to replace exhausted units. By 15 September, the C units could still give a good account of themselves in battle.

Night activity

The Luftwaffe began its eighth consecutive night of bombing London on 15 September. Soon after midnight, at 00:00, 13 unidentified Dornier Do 17
Dornier Do 17
The Dornier Do 17, sometimes referred to as the Fliegender Bleistift , was a World War II German light bomber produced by Claudius Dornier's company, Dornier Flugzeugwerke...

 light bomber
Light bomber
A light bomber is a relatively small and fast class of military bomber aircraft which were primarily employed before the 1950s. Such aircraft would typically not carry more than one ton of ordnance....

s attacked the capital. At 00:15 two Junkers Ju 88
Junkers Ju 88
The Junkers Ju 88 was a World War II German Luftwaffe twin-engine, multi-role aircraft. Designed by Hugo Junkers' company through the services of two American aviation engineers in the mid-1930s, it suffered from a number of technical problems during the later stages of its development and early...

s followed from Kampfgeschwader 51
Kampfgeschwader 51
Kampfgeschwader 51 "Edelweiss" was a Luftwaffe bomber unit during World War II. The unit began forming in December 1939. The unit operated the Dornier Do 17, Heinkel He 111 and Junkers Ju 88 light and medium bombers...

(Bomber Wing 51 or KG 51). A further 11 Heinkel He 111
Heinkel He 111
The Heinkel He 111 was a German aircraft designed by Siegfried and Walter Günter in the early 1930s in violation of the Treaty of Versailles. Often described as a "Wolf in sheep's clothing", it masqueraded as a transport aircraft, but its purpose was to provide the Luftwaffe with a fast medium...

s from an unidentified unit bombed the city again at 00:50. At 02:00, five He 111s from Kampfgeschwader 4
Kampfgeschwader 4
Kampfgeschwader 4 "General Wever" was a Luftwaffe bomber unit during World War II. The unit was formed in May 1939. The unit operated the Dornier Do 17, Junkers Ju 88 and Heinkel He 111 medium bombers, with later service on the Heinkel He 177 heavy bomber...

(KG 4) bombed the city. A full strike by the Geschwader had been planned, but bad weather had forced a cancellation after five He 111s had taken off. Most of the damage was done to residential areas in Fulham
Fulham
Fulham is an area of southwest London in the London Borough of Hammersmith and Fulham, SW6 located south west of Charing Cross. It lies on the left bank of the Thames, between Putney and Chelsea. The area is identified in the London Plan as one of 35 major centres in Greater London...

, Chelsea
Chelsea, London
Chelsea is an area of West London, England, bounded to the south by the River Thames, where its frontage runs from Chelsea Bridge along the Chelsea Embankment, Cheyne Walk, Lots Road and Chelsea Harbour. Its eastern boundary was once defined by the River Westbourne, which is now in a pipe above...

 and Westminster
Westminster
Westminster is an area of central London, within the City of Westminster, England. It lies on the north bank of the River Thames, southwest of the City of London and southwest of Charing Cross...

. Around 19 people were killed and 31 injured. The heaviest casualties were caused when a bomb fell on a Church in Chelsea killing 14 and injuring 26. Small raiding forces bombed Cardiff
Cardiff
Cardiff is the capital, largest city and most populous county of Wales and the 10th largest city in the United Kingdom. The city is Wales' chief commercial centre, the base for most national cultural and sporting institutions, the Welsh national media, and the seat of the National Assembly for...

, Bootle
Bootle
Bootle is a town within the Metropolitan Borough of Sefton in Merseyside, England, and a 'Post town' in the L postcode area. Formally known as Bootle-cum-Linacre, the town is 4 miles  to the north of Liverpool city centre, and has a total resident population of 77,640.Historically part of...

 (in Liverpool
Liverpool
Liverpool is a city and metropolitan borough of Merseyside, England, along the eastern side of the Mersey Estuary. It was founded as a borough in 1207 and was granted city status in 1880...

), Leicester
Leicester
Leicester is a city and unitary authority in the East Midlands of England, and the county town of Leicestershire. The city lies on the River Soar and at the edge of the National Forest...

 and Ipswich
Ipswich
Ipswich is a large town and a non-metropolitan district. It is the county town of Suffolk, England. Ipswich is located on the estuary of the River Orwell...

. At Bootle, only slight damage was done to rail tracks and facilities at West Alexandra Dock.
At sea, a Heinkel He 115
Heinkel He 115
The Heinkel He 115 was a World War II Luftwaffe seaplane with three seats. It was used as a torpedo bomber and performed general seaplane duties, such as reconnaissance and minelaying. The plane was powered by two 720 kW BMW 132K nine-cylinder air-cooled radial engines...

 floatplane, attacked and sank the 5548 LT (5,637 t) freighter Mailsea River off Montrose
Montrose, Angus
Montrose is a coastal resort town and former royal burgh in Angus, Scotland. It is situated 38 miles north of Dundee between the mouths of the North and South Esk rivers...

 with a torpedo
Torpedo
The modern torpedo is a self-propelled missile weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with it or in proximity to it.The term torpedo was originally employed for...

. Soon after, the freighter Halland was sunk by the same method in the area. At 03:30, He 115s flew up the Thames Estuary and dropped magnetic anti-shipping mines. Further mines were dropped in the Bristol Channel
Bristol Channel
The Bristol Channel is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Severn to the North Atlantic Ocean...

, Liverpool Bay
Liverpool Bay
Liverpool Bay is a bay of the Irish Sea between northeast Wales, Cheshire, Lancashire and Merseyside to the east of the Irish Sea. The bay is a classic example of a region of freshwater influence...

 and Milford Haven
Milford Haven
Milford Haven is a town and community in Pembrokeshire, Wales. It is situated on the north side of the Milford Haven Waterway, a natural harbour used as a port since the Middle Ages. The town was founded in 1790 on the north side of the Waterway, from which it takes its name...

 and off Hartlepool
Hartlepool
Hartlepool is a town and port in North East England.It was founded in the 7th century AD, around the Northumbrian monastery of Hartlepool Abbey. The village grew during the Middle Ages and developed a harbour which served as the official port of the County Palatine of Durham. A railway link from...

, Berwick-upon-Tweed
Berwick-upon-Tweed
Berwick-upon-Tweed or simply Berwick is a town in the county of Northumberland and is the northernmost town in England, on the east coast at the mouth of the River Tweed. It is situated 2.5 miles south of the Scottish border....

 and Aberdeen
Aberdeen
Aberdeen is Scotland's third most populous city, one of Scotland's 32 local government council areas and the United Kingdom's 25th most populous city, with an official population estimate of ....

.
RAF night fighter defences were still in their infancy. Most fighters lacked radar and in any case, radar was short-range and unreliable. Instead, they flew outside the anti-aircraft guns' fields of fire on likely approach routes using the pilots' vision to locate enemy aircraft. In later years, the night fighter defences would be highly sophisticated. But in 1940, they were not effective. Just 28 sorties were flown against the nocturnal raids.

There was also air activity over German-held territory. RAF Bomber Command
RAF Bomber Command
RAF Bomber Command controlled the RAF's bomber forces from 1936 to 1968. During World War II the command destroyed a significant proportion of Nazi Germany's industries and many German cities, and in the 1960s stood at the peak of its postwar military power with the V bombers and a supplemental...

 flew 92 sorties against German invasion targets at Boulogne, Calais
Calais
Calais is a town in Northern France in the department of Pas-de-Calais, of which it is a sub-prefecture. Although Calais is by far the largest city in Pas-de-Calais, the department's capital is its third-largest city of Arras....

, Ostend
Ostend
Ostend  is a Belgian city and municipality located in the Flemish province of West Flanders. It comprises the boroughs of Mariakerke , Stene and Zandvoorde, and the city of Ostend proper – the largest on the Belgian coast....

, Dunkirk, and Antwerp. The remaining sorties were directed at Brussels
Brussels
Brussels , officially the Brussels Region or Brussels-Capital Region , is the capital of Belgium and the de facto capital of the European Union...

 marshalling yards, Hamm
Hamm
Hamm is a city in North Rhine-Westphalia , Germany. It is located in the northeastern part of the Ruhr area. As of December 2003 its population was 180,849. The city is situated between the A1 motorway and A2 motorway...

 and Krefeld
Krefeld
Krefeld , also known as Crefeld until 1929, is a city in North Rhine-Westphalia, Germany. It is located northwest of Düsseldorf, its centre lying just a few kilometres to the west of the River Rhine; the borough of Uerdingen is situated directly on the Rhine...

. One Armstrong Whitworth Whitley
Armstrong Whitworth Whitley
The Armstrong Whitworth A.W.38 Whitley was one of three British twin-engine, front line medium bomber types in service with the Royal Air Force at the outbreak of the Second World War...

 failed to return. It was lost to ground fire over the Netherlands
Netherlands
The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

. A total of 157 sorties were flown overall. By the September 1940, some 10-13% of invasion barges had been sunk.

Daylight contact

The first combat in daylight began just after 08:00. A He 111 from Aufklärungsgruppe 51 (Long-range reconnaissance Group 51), based near Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

, was intercepted and shot down over the Channel by Hurricanes from No. 87 Squadron RAF
No. 87 Squadron RAF
No. 87 Squadron RAF was an aircraft squadron of the Royal Air Force during the First World War and Second World War.-World War I:87 Squadron Royal Flying Corps was first formed on 1 September 1917 at Upavon from elements of the Central Flying School...

. A Heinkel He 59
Heinkel He 59
|-See also:-Bibliography:* Green, William.War Planes of the Second World War: Volume Six: Floatplanes. London: Macdonald, 1962.* Green, William. Warplanes of the Third Reich. New York: Doubleday, 1972. ISBN 0-385-05782-2....

 air-sea rescue aircraft was dispatched, but found no trace of the Heinkel or its five crew.

Further flights were made by high altitude Ju 88s. One photographed RAF Sealand
RAF Sealand
RAF Sealand was a former Royal Air Force station in Flintshire, north Wales and operated between 1916 and 2006.Under defence cuts announced in 2004 RAF Sealand was completely closed in April 2006. All remaining RAF units were moved to RAF Leeming...

, RAF Pembrey
RAF Pembrey
RAF Pembrey was a Royal Air Force station, home to 233 Operational Conversion Unit which flew de Havilland Vampires and Hawker Hunters until its closure in 1957. Site of one of only five Dome Trainer Buildings still existing in the UK...

 and RAF Woodward. It also managed to reach Manchester
Manchester
Manchester is a city and metropolitan borough in Greater Manchester, England. According to the Office for National Statistics, the 2010 mid-year population estimate for Manchester was 498,800. Manchester lies within one of the UK's largest metropolitan areas, the metropolitan county of Greater...

, Liverpool and Birkenhead
Birkenhead
Birkenhead is a town within the Metropolitan Borough of Wirral in Merseyside, England. It is on the Wirral Peninsula, along the west bank of the River Mersey, opposite the city of Liverpool...

 without interception. Another managed to photograph the Thames Haven
Shell Haven
Shell Haven was a port on the north bank of the Thames Estuary at the eastern end of Thurrock, Essex, England and then an oil refinery. The refinery closed in 1999 and the site was purchased by DP World who received planning consent in May 2007 for the new London Gateway deep water container port...

, RAF Netheravon, RAF Benson
RAF Benson
RAF Benson is a Royal Air Force station near Benson in South Oxfordshire, England. It is home to the Royal Air Force's support helicopters, the Aérospatiale Puma and the EH-101 Merlin, known as the Puma HC.Mk 1 and the Merlin HC.Mk 3 and Mk 3a....

 and the Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 base at Chatham Dockyard
Chatham Dockyard
Chatham Dockyard, located on the River Medway and of which two-thirds is in Gillingham and one third in Chatham, Kent, England, came into existence at the time when, following the Reformation, relations with the Catholic countries of Europe had worsened, leading to a requirement for additional...

. Interception of these high altitude aircraft was difficult, and none were lost on 15 September 1940.

KG 76 takes off

The offensive got underway at 10:10 in the morning. Major Alois Lindmayr
Alois Lindmayr
Alois Lindmayr was a highly decorated Oberst in the Luftwaffe during World War II. He was also a recipient of the Knight's Cross of the Iron Cross...

 Gruppenkommandeur
Gruppenkommandeur
Gruppenkommandeur is a Luftwaffe position , that is the equivalent of a commander of a group or wing in other air forces. Gruppenkommandeur usually has the rank of Hauptmann or Major, and commands a Gruppe, which is a sub-division of a Geschwader. A Gruppe usually consists of three or four...

(Group Commander) of I./KG 76 led the entire formation. Lindmayr was an experienced combat veteran having won the Knight's Cross of the Iron Cross
Knight's Cross of the Iron Cross
The Knight's Cross of the Iron Cross was a grade of the 1939 version of the 1813 created Iron Cross . The Knight's Cross of the Iron Cross was the highest award of Germany to recognize extreme battlefield bravery or successful military leadership during World War II...

 for his effective low-level attacks in France. III./Kampfgeschwader 76
Kampfgeschwader 76
Kampfgeschwader 76 was a Luftwaffe bomber Group during World War II .Its units participated on all of the fronts in the European Theatre throughout the conflict, and served until the last day of the war...

(KG 76) took off with 19 Do 17s from their base at Cormeilles-en-Vexin
Cormeilles-en-Vexin
Cormeilles-en-Vexin is a commune in the Val-d'Oise department in Île-de-France in northern France.-References:** -External links:* *...

. At the same time, 20 mi (32.2 km) to the north, I./KG 76 took off. Usually a Gruppe (Group) could field 27 bombers. After weeks of attrition, I./KG 76 could put up only eight Do 17s. The Geschwader had to field two Gruppen to do the work of one. Most of the Dornier's were in bad shape, and were worn down by intensive operations. The two groups rendezvoused at Amiens
Amiens
Amiens is a city and commune in northern France, north of Paris and south-west of Lille. It is the capital of the Somme department in Picardy...

 then proceeded to Cap Gris Nez
Cap Gris Nez
Cap Gris Nez is a cape on the Côte d'Opale in the Pas-de-Calais département in northern France....

 to pick up their Bf 109 fighter escort. As the attacks on Britain had caused heavy losses to the Luftwaffe, German crews and Geschwader experimented with innovative ways to defend themselves. One pilot, Feldwebel
Feldwebel
Feldwebel is a German military rank which has existed since at least the 18th century with usage as a title dating to the Middle Ages. The word Feldwebel is usually translated as sergeant being rated OR-6 in the NATO rank comparison scale, equivalent to the British Army Sergeant and the US Army...

 Rolf Heitsch, had his Dornier fitted with an infantry flame thrower in its tail. If it failed to down a fighter that got too close, it might drive the enemy off: if it worked, it could be fitted to other bombers. After take-off the formation broke up in cloud and was delayed for 10 minutes to allow reforming. Two bombers failed to do and returned to base.

British scramble

Initially, the operations room
Battle of Britain Bunker
The Battle of Britain Bunker is an underground operations room at RAF Uxbridge, formerly used by No. 11 Group Fighter Command during the Second World War. Fighter aircraft operations were controlled from there throughout the War but most notably during the Battle of Britain and on D-Day...

 at RAF Uxbridge
RAF Uxbridge
RAF Uxbridge was a Royal Air Force station in Uxbridge within the London Borough of Hillingdon. Its grounds covered originally belonging to the Hillingdon House estate, which was purchased by the British Government in 1915, three years before the founding of the RAF...

 was disturbed by a visit from Prime Minister
Prime minister
A prime minister is the most senior minister of cabinet in the executive branch of government in a parliamentary system. In many systems, the prime minister selects and may dismiss other members of the cabinet, and allocates posts to members within the government. In most systems, the prime...

 Winston Churchill
Winston Churchill
Sir Winston Leonard Spencer-Churchill, was a predominantly Conservative British politician and statesman known for his leadership of the United Kingdom during the Second World War. He is widely regarded as one of the greatest wartime leaders of the century and served as Prime Minister twice...

. Most of the plotting tables were bare, save for a few plots indicating German reconnaissance machines. Most of the Women's Auxiliary Air Force
Women's Auxiliary Air Force
The Women's Auxiliary Air Force , whose members were invariably referred to as Waafs , was the female auxiliary of the Royal Air Force during World War II, established in 1939. At its peak strength, in 1943, WAAF numbers exceeded 180,000, with over 2,000 women enlisting per week.A Women's Royal Air...

 (WAAF) were relaxing, in spite of Churchill’s presence (he had ordered that they not behave any differently). However, at 10:30 the first German aircraft triggered the alarm at Chain Home
Chain Home
Chain Home was the codename for the ring of coastal Early Warning radar stations built by the British before and during the Second World War. The system otherwise known as AMES Type 1 consisted of radar fixed on top of a radio tower mast, called a 'station' to provide long-range detection of...

 radar station at Dover
Dover
Dover is a town and major ferry port in the home county of Kent, in South East England. It faces France across the narrowest part of the English Channel, and lies south-east of Canterbury; east of Kent's administrative capital Maidstone; and north-east along the coastline from Dungeness and Hastings...

. The filter room at Stanmore recognised the formation as hostile. The WAAF detailed group and sector commands throughout the south that 40-plus enemy aircraft were entering Kentish airspace.

By 11:04, Lindmayr's Dorniers had reached Calais. Wing Commander Lord Willoughby de Broke, Park’s senior fighter controller, watched with the Prime Minister and Park as the Germans moved closer. De Broke had a problem of his own. He had no way of knowing which plots represented bombers and fighters. Bombers had to be intercepted, fighters could be ignored. The trick was to strike a balance and time the interception as well as possible. On one hand he must scramble early and allow enough time to get into a favourable attack position; but on the other hand he had to avoid scrambling them too early lest the fighters run short of fuel before they met the enemy. Park joined de Broke. After a brief discussion he decided to commit several squadrons from RAF Biggin Hill. Park realised the raid could be a trap. Though the target seemed to be London, the aircraft, comprising 120-150 in number, may be an advanced guard of Bf 109s sent to clear the skies or disrupt fighter defences. Still, he gambled and sent nine squadrons into action at 11:15.
No. 92 Squadron RAF
No. 92 Squadron RAF
No. 92 Squadron, also known as No 92 Squadron, of the Royal Air Force was formed as part of the Royal Flying Corps at London Colney as a fighter squadron on 1 September 1917. It deployed to France in July 1918 and saw action for just four months, until the end of the war. During the conflict it...

 and No. 72 Squadron RAF
No. 72 Squadron RAF
No. 72 Squadron Royal Air Force started its service life supporting the army during World War I on operations in Middle East and afterwards was quickly disbanded. In its second incarnation the squadron was a real fighter unit, transitioning from Gloster Gladiator biplanes to Gloster Javelin...

 scrambled Spitfires from Biggin Hill. Their orders were to cover the air space over Canterbury
Canterbury
Canterbury is a historic English cathedral city, which lies at the heart of the City of Canterbury, a district of Kent in South East England. It lies on the River Stour....

 at 25000 ft (7,620 m). De Broke sensed by this time that nothing else was coming in. If this was the main attack, he decided it must be met with force. He ordered squadrons from RAF Northolt
RAF Northolt
RAF Northolt is a Royal Air Force station situated in South Ruislip, east by northeast of Uxbridge in the London Borough of Hillingdon, West London. Approximately north of London Heathrow Airport, the station also handles a large number of private civil flights...

, RAF Kenley
RAF Kenley
The former Royal Air Force Station Kenley, more commonly known as RAF Kenley was a station of the Royal Flying Corps in World War I and the RAF in World War II. It is located near Kenley, London, England.-History:...

 and RAF Debden
RAF Debden
RAF Debden is a former RAF airfield in England. The field is located 3 miles SE of Saffron Walden and approximately 1 mile north of the village of Debden in North Essex.-RAF Fighter Command:...

 to standby. At 11:20, he ordered RAF Hornchurch
RAF Hornchurch
RAF Hornchurch was an airfield in the south of Hornchurch in what is now the London Borough of Havering. Known as Sutton's Farm during the First World War, it occupied of the farm of the same name and was situated east north-east of Charing Cross...

 and RAF North Weald and No. 10 Group’s RAF Middle Wallop into the air. Park now had two squadrons over Canterbury, four over Biggin Hill and Maidstone
Maidstone
Maidstone is the county town of Kent, England, south-east of London. The River Medway runs through the centre of the town linking Maidstone to Rochester and the Thames Estuary. Historically, the river was a source and route for much of the town's trade. Maidstone was the centre of the agricultural...

 with further back up of two squadrons over Chelmsford
Chelmsford
Chelmsford is the county town of Essex, England and the principal settlement of the borough of Chelmsford. It is located in the London commuter belt, approximately northeast of Charing Cross, London, and approximately the same distance from the once provincial Roman capital at Colchester...

 at 15000 ft (4,572 m).

The plan was for Nos. 72 and 92 to engage the high escort. No. 603 Squadron RAF
No. 603 Squadron RAF
No. 603 Squadron is a squadron of the Royal Auxiliary Air Force, based in Edinburgh, Scotland. The primary role of 603 Squadron, since reforming on 1 October 1999, has been as a Survive to Operate squadron, as well as providing Force Protection.-Formation and early years:No...

 would arrive on the scene just afterward and get at the close escort (JG 3). The pair from North Weald would go to Maidstone, so if the bombers got through, they would run into them over London. Despite Park’s reservations about Leigh-Mallory’s Big Wing, he ordered that it was time for it to be tested. If the Germans attempted to use the Thames Estuary as a navigation aid, as so often before, fighters from 12 Group’s RAF Duxford could meet them over Hornchurch
Hornchurch
Hornchurch is a large suburban town in England, and part of the London Borough of Havering. Hornchurch is in North-East London .It is located east-northeast of Charing Cross and is one of the locally important district centres identified in the London Plan. It comprises a number of shopping...

 at 20000 ft (6,096 m). They would have a 5000 ft (1,524 m) height advantage to the west of the bombers and attack out of the Sun, if Leigh-Mallory could get them there in time. The order was sent to Stanmore at 11:20 and Duxford scrambled No. 19, 310
No. 310 Squadron RAF
No. 310 Squadron RAF was a Czechoslovakian-manned fighter squadron of the Royal Air Force during the Second World War .It was first formed on 10 July 1940 at RAF Duxford, equipped with Hawker Hurricane I fighters and was the first RAF squadron to be raised crewed by foreign nationals, in this case...

, 302 and No. 611 Squadron RAF
No. 611 Squadron RAF
No. 611 Squadron was a British Auxiliary Air Force later Royal Auxiliary Air Force squadron first formed in 1936 and lastly disbanded in 1957.-Early years:...

. No. 242 Squadron RAF
No. 242 Squadron RAF
No. 242 Squadron RAF was a Royal Air Force squadron. It flew in many roles during its active service and it is also known for being the first squadron Douglas Bader commanded.-In World War I:No...

’s leader, Wing Commander
Wing Commander (rank)
Wing commander is a commissioned rank in the Royal Air Force and the air forces of many other Commonwealth countries...

 Douglas Bader led the assault with the 56 fighters. They were airborne at 11:22.

Close to contact

The Dorniers were supported by a German fighter aircraft that had been sent out in advance of the main strike. Jagdgeschwader 27
Jagdgeschwader 27
Jagdgeschwader 27 Afrika was a World War II Luftwaffe Geschwader. It was most famous for service in the North African Campaign, supporting the Deutsches Afrikakorps.- Formation:...

(JG 27) and I./Jagdgeschwader 52
Jagdgeschwader 52
Jagdgeschwader 52 of the Luftwaffe, was the most successful fighter-wing of all time, with a claimed total of more than 10,000 victories over enemy aircraft during World War II. It was the unit of the top three scoring Fighter aces of all time, Erich Hartmann, Gerhard Barkhorn and Günther Rall...

(JG 52) Bf 109s flew in toward London at 16000 ft (4,876.8 m), while Jagdgeschwader 53
Jagdgeschwader 53
Jagdgeschwader 53 Pik-As was a Luftwaffe fighter-wing of World War II. It operated in Western Europe and in the Mediterranean.Jagdgeschwader 53 - or as it was better known, the "Pik As" Geschwader - was one of the oldest German fighter units of World War II with its origins going back to 1937...

(JG 53) flew top cover over the bombers. Some 30 Jagdgeschwader 3
Jagdgeschwader 3
Jagdgeschwader 3 Udet was a Luftwaffe fighter-wing of World War II. The Geschwader operated on all the German fronts in the European Theatre of World War II. It was named after Ernst Udet in 1942.-Campaign in the West :...

(JG 3) flew close escort. The bombers were travelling slowly, forcing the fighters to lower their flaps to stay with the bombers, which made them sitting ducks. They crossed the coast at Folkestone
Folkestone
Folkestone is the principal town in the Shepway District of Kent, England. Its original site was in a valley in the sea cliffs and it developed through fishing and its closeness to the Continent as a landing place and trading port. The coming of the railways, the building of a ferry port, and its...

 at 11:36. Fighters from II.Lehrgeschwader 2
Lehrgeschwader 2
Lehrgeschwader 2 was a Luftwaffe unit during World War II, operating three fighter, night fighter, reconnaissance and ground support Gruppen ....

(Learning Wing 2) were also to form part of the escort. They flew in advance of the main force to drop 550 lb (249.5 kg) bombs and then resume their role as fighters. The strong head wind slowed the Dorniers, which meant that the Germans took even longer to reach the target while burning up the Bf 109s' limited fuel supplies. It also speeded up the RAF fighters coming in from the north.

LG 2 took off as the bombers crossed the English coast. Even with bombs, the Bf 109s were expected to overhaul the bombers and attack London a few minutes before the main raids began. Park interpreted the LG 2 raid as a major thrust and was determined to meet the "second wave" as he saw it. He scrambled six more squadrons but kept four reserve squadrons at Hornchurch and RAF Tangmere
RAF Tangmere
RAF Tangmere was a Royal Air Force station famous for its role in the Battle of Britain, located at Tangmere village about 3 miles east of Chichester in West Sussex, England. American RAF pilot Billy Fiske died at Tangmere and was the first American aviator to die during World War II...

. As the forces closed, around 120 Bf 109s and 25 Do 17s were facing 245 Spitfires and Hurricanes.

Combat

Park's plan worked. The Biggin Hill squadrons, 72 and 92 Squadrons made contact with the enemy over Canterbury. Arriving at 25000 ft (7,620 m), they found themselves 3000 ft (914.4 m) above the top covering German fighters (JG 53). Beyond Canterbury, they could also see KG 76 and JG 3 over Ashford
Ashford, Kent
Ashford is a town in the borough of Ashford in Kent, England. In 2005 it was voted the fourth best place to live in the United Kingdom. It lies on the Great Stour river, the M20 motorway, and the South Eastern Main Line and High Speed 1 railways. Its agricultural market is one of the most...

. At 11:50, they attacked out of the Sun. Taken by surprise, four or five of I./JG 53s Bf 109s were hit by the Spitfires. Spitfires of 92 Squadron tried to charge through the fighter screen to get at the Dorniers but were blocked. Soon afterwards, No. 603 Squadron joined the fight. Park had broken up the top level escort. Some 23 Hurricanes of Nos. 253
No. 253 Squadron RAF
RAF 253 Squadron was based at RAF Waterbeach in the two years 1955 to 1957. It flew Vampire and Venom fighter aircraft.253 squadron Nighthawks.Squadron commander wing commander FinlaysonOne Vampire T Mk 11...

 and 501 Squadrons
No. 501 Squadron RAF
No 501 Squadron was the fourteenth of the twenty-one flying units in the Royal Auxiliary Air Force, the volunteer reserve part of the British Royal Air Force. The squadron won seven battle honours, flying Hurricane, Spitfire and Tempest fighter aircraft during World War II, and was one of the most...

 arrived at the same height as the bombers and delivered a head-on attack. Lindmayr's crews were experienced and the formation held its nerve and remained intact. JG 3 in turn attacked the Hurricanes dispatching two from 501 Squadron. Northolt's No. 229 and No. 303 Squadron RAF were also arriving and engaged JG 52. One of 239 Squadrons Hurricanes and a JG 52 Bf 109 collided. The bombers ploughed on and reached Lewisham
Lewisham
Lewisham is a district in South London, England, located in the London Borough of Lewisham. It is situated south-east of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London.-History:...

. However, the formation was now isolated. The escorts were embroiled in dogfights all over Kent
Kent
Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

 and half the RAF fighters were yet to engage. JG 53 were further engaged by several squadrons; Nos. 1
No. 1 Squadron RCAF
No. 1 Squadron Royal Canadian Air Force was formed as a fighter unit at Trenton, Ontario on 21 September 1937 with Siskin aircraft. The squadron was formed from the Fighter Flight of No. 3 Squadron. In August 1938, the squadron moved to Calgary, Alberta and was re-equipped with Hawker Hurricane...

, No. 46
No. 46 Squadron RAF
No. 46 Squadron of the Royal Flying Corps and the Royal Air Force, formed in 1916, was disbanded and re-formed three times before its last disbandment in 1975. It served in both World War I and World War II.- World War I :...

, No. 249 and No. 605 Squadron RAF
No. 605 Squadron RAF
No 605 Squadron was formed as an Auxiliary Air Force Squadron. Initially formed as a bomber unit, it was one of the most successful participants of the Battle of Britain. It also had the distinction of being active during World War II at two fronts at a time, when the squadron was split up between...

. No. 605, lead by Archie McKellar
Archie McKellar
Flight Lieutenant Archibald Ashmore McKellar DSO DFC & Bar , was a top fighter ace of the Royal Air Force during the Battle of Britain in World War II .Most of McKellar's victories were scored in the Hawker Hurricane....

 broke away and delivered a 12-fighter attack scoring some hits on the bombers. JG 27 meanwhile suffered two casualties, one possibly against No. 19 Squadron. It claimed only one British fighter that day.
JG 3 claimed two fighters for one loss.

Up until now, the Bf 109s had successfully blocked attacks on the bombers. However, Park's tactics of attacking the Germans all along the route forced their fighters to use up fuel more quickly in dogfights. When the outskirts of London came into view, they began to depart at 12:07 north of Lewisham.

The North Weal pair, No. 504 and 257 Squadrons engaged the Dorniers with 20 Hurricanes. One German pilot, Feldwebel Robert Zehbe developed engine trouble and lagged half a mile behind the main bomber stream. He was set upon and shot down. As he bailed out he set the aircraft on autopilot. He landed near The Oval
The Oval
The Kia Oval, still commonly referred to by its original name of The Oval, is an international cricket ground in Kennington, in the London Borough of Lambeth. In the past it was also sometimes called the Kennington Oval...

 and was severely wounded by a civilian mob. He was rescued by the British Army
British Army
The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 but died of his wounds. His Dornier meanwhile flew on empty and attracted a swarm of fighters. Eventually Ray Holmes of 504 Squadron rammed the bomber. The tail came off and air pressure snapped off the outer wings short of the engines. The bomber crashed onto the forecourt of London Victoria station. During its spinning dive, the gravitational force on the Dornier caused its bombs to be released, which hit or landed near to Buckingham Palace
Buckingham Palace
Buckingham Palace, in London, is the principal residence and office of the British monarch. Located in the City of Westminster, the palace is a setting for state occasions and royal hospitality...

 nearby, damaging the building. Holmes survived.

Directly over the target, Bader's Big Wing arrived and attacked while the Germans were on the bomb-run. Thirty seconds after the release of the bombs, they hit the target area, the Battersea rail lines next to Battersea Park
Battersea Park
Battersea Park is a 200 acre green space at Battersea in the London Borough of Wandsworth in England. It is situated on the south bank of the River Thames opposite Chelsea, and was opened in 1858....

 on the Thames south bank. Each Dornier's payload of twenty 110 lb (49.9 kg) bombs carved a run 500 yd (457.2 m) long and 25 yd (22.9 m) wide. Some fell on the high-density civilian housing. The bombs missed Clapham Junction but fell across the rail network tracks that connected it to Victoria Station north of the Thames and the main line heading north east on the south side of the river. The damage done had cut the tracks in Battersea in several places and a viaduct had collapsed over some rails. Rail traffic was halted. Four unexploded bombs delayed repairs. The rail lines were only out of action for three days.
But within minutes, the Do 17 formation had been reduced to 15 aircraft and most of them were damaged. Six had been shot down and four were attempting to make a run for home. The remainder dropped their bombs and were met by a covering force of Bf 109s and landed back in France without further combat. LG 2 meanwhile had been and gone. They saw one rail station and released their bombs and returned home. They saw only one British fighter, No. 46 Squadron
No. 46 Squadron RAF
No. 46 Squadron of the Royal Flying Corps and the Royal Air Force, formed in 1916, was disbanded and re-formed three times before its last disbandment in 1975. It served in both World War I and World War II.- World War I :...

’s Pilot Officer
Pilot Officer
Pilot officer is the lowest commissioned rank in the Royal Air Force and the air forces of many other Commonwealth countries. It ranks immediately below flying officer...

 Gunning who reported the make up of the formation. Park had decided to ignore their raid.

Overall the attackers lost six bombers and 12 Bf 109s, some 12.5% of its strength. However, the British claimed 81 aircraft, 26 by the Duxford Wing. Zehbe's Dornier alone was claimed nine times. Among the German casualties that day was Rolf Heitsch and his 'flame throwing Dornier'. Park would not have been pleased that despite being stripped of protection the small force of bombers lost only a quarter of its strength while surrounded by 100 fighters. Still, the operation had been a victory. Fighter Command lost 13 fighters, eight were claimed by JG 52.

Interlude: 13:00 to 13:45

At 13:00, the German formations were plotted making their way back to France. Churchill was delighted with the results. The WAAF had been due to change shift, but the scheduled relief time could not take place during an operation. By 13:05 the fighters were back on the ground and rearming and refuelling began immediately to return the machine back to battle ready status as soon as possible while the pilots wrote their combat reports which including filing claims and details of their battle to the best of their recollections. Bader's Big Wing landed. Owing to battle damage, 49 of Duxford's 56 fighters were operational by the afternoon.

By this time, the German bombers were touching down in the Pas de Calais. Two were so badly damaged that they were written off in crash landings, bring the total losses to eight Do 17s. Almost all bore the scars of battle. One machine had sustained 70 hits, another 200.

In the after noon, RAF Bomber Command abandoned more attacks on invasion ports because of insufficient cloud cover. Six Bristol Blenheim
Bristol Blenheim
The Bristol Blenheim was a British light bomber aircraft designed and built by the Bristol Aeroplane Company that was used extensively in the early days of the Second World War. It was adapted as an interim long-range and night fighter, pending the availability of the Beaufighter...

s undertook an armed reconnaissance over the North Sea
North Sea
In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...

. RAF Coastal Command
RAF Coastal Command
RAF Coastal Command was a formation within the Royal Air Force . Founded in 1936, it was the RAF's premier maritime arm, after the Royal Navy's secondment of the Fleet Air Arm in 1937. Naval aviation was neglected in the inter-war period, 1919–1939, and as a consequence the service did not receive...

 flew 95 sorties for anti-invasion, anti-submarine, mine laying and reconnaissance missions. Spitfires photographed every port from Antwerp to Cherbourg. They returned with evidence of a gradually increasing build up of amphibious forces. All the Command's aircraft returned.

German take off, British detection

Even before the Do 17s of KG 76 had touched down, the next wave was already just getting airborne. II and III./Kampfgeschwader 2
Kampfgeschwader 2
Kampfgeschwader 2 " Holzhammer " was a Luftwaffe bomber unit during the Second World War. The unit was formed in May 1939. The unit operated the Dornier Do 17 light bomber, Dornier Do 217 and Junkers Ju 188 heavy bombers....

(KG 2), (from Boissy-Saint-Léger
Boissy-Saint-Léger
Boissy-Saint-Léger is a commune in the southeastern suburbs of Paris, France. It is located from the center of Paris.-Transport:Boissy-Saint-Léger is served by Boissy-Saint-Léger station on Paris RER line A.-References:** -External links:*...

 and Cambrai
Cambrai
Cambrai is a commune in the Nord department in northern France. It is a sub-prefecture of the department.Cambrai is the seat of an archdiocese whose jurisdiction was immense during the Middle Ages. The territory of the Bishopric of Cambrai, roughly coinciding with the shire of Brabant, included...

) II./Kampfgeschwader 3
Kampfgeschwader 3
Kampfgeschwader 3 "Blitz" was a Luftwaffe bomber wing during World War II .Its units participated on all of the fronts in the European Theatre until it was disbanded in September-October 1944...

(KG 3) (from Antwerp), I and II./Kampfgeschwader 53
Kampfgeschwader 53
Kampfgeschwader 53 "Legion Condor" was a Luftwaffe bomber wing during World War II .Its units participated on all of the fronts in the European Theatre until it was disbanded in May 1945...

(KG 53) (from Lille
Lille
Lille is a city in northern France . It is the principal city of the Lille Métropole, the fourth-largest metropolitan area in the country behind those of Paris, Lyon and Marseille. Lille is situated on the Deûle River, near France's border with Belgium...

) and I and II./Kampfgeschwader 26
Kampfgeschwader 26
Kampfgeschwader 26 "Löwengeschwader" was a Luftwaffe bomber wing during World War II .Its units participated on all of the fronts in the European Theatre until it was disbanded in September–October 1944. It operated two of the major German bomber types; the Heinkel He 111 and the Junkers Ju 88...

(from Wevelghem and Gilze en Rijen
Gilze en Rijen
Gilze en Rijen is a municipality in the southern Netherlands. The municipality contains four villages Rijen, Gilze, Hulten and Molenschot.Rijen grew in the 19th century due to its leather factories.- Population centres :*Rijen...

) took off to target the West India Docks
West India Docks
The West India Docks are a series of three docks on the Isle of Dogs in London, the first of which opened in 1802. The docks closed to commercial traffic in 1980 and the Canary Wharf development was built on the site.-History:...

 and Royal Victoria Dock
Royal Victoria Dock
The Royal Victoria Dock is the largest of three docks in the Royal Docks of east London, now part of the redeveloped Docklands.-History:...

 north of the Thames as well as the warehouses of the Surrey Commercial Docks
Surrey Commercial Docks
The Surrey Commercial Docks were a large group of docks in Rotherhithe on the south bank of the Thames in South East London. The docks operated in one form or another from 1696 to 1969...

 in the south. JG 53 and Adolf Galland
Adolf Galland
Adolf "Dolfo" Joseph Ferdinand Galland was a German Luftwaffe General and flying ace who served throughout World War II in Europe. He flew 705 combat missions, and fought on the Western and the Defence of the Reich fronts...

's Jagdgeschwader 26
Jagdgeschwader 26
Jagdgeschwader 26 Schlageter was a Luftwaffe fighter-wing of World War II. It operated mainly in Western Europe against Great Britain, France the United States but also saw service against Russia. It was named after Albert Leo Schlageter, a World War I veteran and Freikorps member arrested and...

(JG 26) were to escort the bombers. The fighters met them as the bombers formed up over Calais.

The phalanx of the German bombers headed for Dungeness. At the head as 43 Do 17s from KG 2; next, a couple of miles behind, came 24 He 111s of KG 53; finally, a couple of miles further behind, came 19 Do 17s from KG 3; followed by 28 He 111s of KG 26. The headwind was present again, and the 114 bombers battled against it. The German fighter pilots kept close escort. They detested the tactic. It handed the initiative to the British regarding how and when to attack. Moreover, if they were bounced by Spitfires, the Bf 109s would take too long to accelerate to full throttle in order to escape.

The German fighter escort consisted of five Gruppen from JG 3, JG 53 and Jagdgeschwader 77
Jagdgeschwader 77
Jagdgeschwader 77 Herz As was a Luftwaffe fighter Geschwader during World War II. It served in all the German theaters of war, from Western Europe to the Eastern Front, and from the high north in Norway to the Mediterranean.All three gruppen within the Geschwader operated variants of the...

(JG 77). LG 2 Bf 109s flew top cover while Adolf Galland
Adolf Galland
Adolf "Dolfo" Joseph Ferdinand Galland was a German Luftwaffe General and flying ace who served throughout World War II in Europe. He flew 705 combat missions, and fought on the Western and the Defence of the Reich fronts...

's JG 26 and Jagdgeschwader 51
Jagdgeschwader 51
Jagdgeschwader 51 Mölders was a Luftwaffe fighter wing during World War II, named after the fighter ace Werner Mölders in 1942. JG 51's pilots won more Ritterkreuz des Eisernen Kreuzes than any other Jagdgeschwader, and flew combat from 1939 in all major theatres of war. Flying Bf 109s and then...

(JG 51) conducted fighter sweeps in advance of the main bomber stream. For the sake of appearances (the morale of the bomber crews), Zerstörergeschwader 26
Zerstörergeschwader 26
Zerstörergeschwader 26 "Horst Wessel" was a Luftwaffe heavy/destroyer Fighter Aircraft-wing of World War II.-History:Zerstörergeschwader 26 was formed in early 1936 from the Jagdgeschwader 134 "Horst Wessel". The Geschwaderstab and I. Gruppe was located in Dortmund, II. Gruppe in Werl and III....

(Destroyer Wing 26 or ZG 26) flying the Messerschmitt Bf 110
Messerschmitt Bf 110
The Messerschmitt Bf 110, often called Me 110, was a twin-engine heavy fighter in the service of the Luftwaffe during World War II. Hermann Göring was a proponent of the Bf 110, and nicknamed it his Eisenseiten...

 flew close escort to KG 26. It was twice as small as the formation that hit London on 7 September, but instead of having two fighters for every bomber, there were four. Nor could the German pilots complain about being tied to the bombers. Sufficient numbers of fighters were allowed to roam on free-ranging patrols.

At 13:45, Chain Home radar picked up the German raids. No. 11 Group scrambled one Spitfire from RAF Hawkinge
RAF Hawkinge
RAF Hawkinge was an airfield in Kent, near to the south coast and the closest airfield to the French coast.It took part in the Battle of Britain and it was home to No. 79 Squadron RAF. After the war, the station hosted the Home Command Gliding Centre, and is fondly remembered by many Air Cadets as...

 on the channel coast. Flown by No. 92 Squadron Pilot Officer
Pilot Officer
Pilot officer is the lowest commissioned rank in the Royal Air Force and the air forces of many other Commonwealth countries. It ranks immediately below flying officer...

 Alan Wright, his job was to climb as quickly as possible over the sea and act as a spotter. He was to report on the direction, height, composition and strength of the German formation. The radar operators assessed the strengths of the three largest formations at 30, 50, and 60 plus. Five smaller formations added up to 85 plus. In actual fact, the British estimate of 225 aircraft proved too small. The German force was 475 aircraft strong. Shortly before 14:00, the German formation left the French coast. Park ordered his forces to repeat the earlier interception tactic. Four pairs of squadrons were ordered to patrol Sheerness
Sheerness
Sheerness is a town located beside the mouth of the River Medway on the northwest corner of the Isle of Sheppey in north Kent, England. With a population of 12,000 it is the largest town on the island....

, Chelmsford, Hornchurch and RAF Kenley
RAF Kenley
The former Royal Air Force Station Kenley, more commonly known as RAF Kenley was a station of the Royal Flying Corps in World War I and the RAF in World War II. It is located near Kenley, London, England.-History:...

.

RAF scramble

At 14:00, No. 11 Group released 68 fighters. Hornchurch's No. 603 and No. 222 Squadron RAF
No. 222 Squadron RAF
-In World War I:The Squadron was formally formed at Thasos on 1 April 1918 from A squadron of the former No. 2 Wing, RNAS when the Royal Air Force was formed. Later, 6 April 1918 former Z Squadron of No. 2 Wing, RNAS was added to the strength. Renumbered No. 62 Wing and consisting of Nos...

 committed 20 Spitfires to Sheerness at 20000 ft (6,096 m). The squadrons would fail to find each other and went into action singly. At Debden, No. 17 Squadron RAF, No. 257 Squadron RAF
No. 257 Squadron RAF
-In World War I:No. 257 Squadron was formed at Dundee on 18 August 1918 from Nos. 318 and 319 Flights. It flew both seaplanes and flying boats on anti-submarine patrols from Dundee until the end of the First World War and disbanded there on 30 June 1919....

 sent 20 Hurricanes to Chelmsford at 15000 ft (4,572 m). Kenley dispatched No. 501 and 605 Squadrons with 17 Hurricanes to Kenley at just 5000 ft (1,524 m). North Weal ordered No. 249 and 504 Squadrons to cover Hornchurch at 15000 ft (4,572 m).

Just five minutes later, the German bombers began splitting into three groups heading for the coast between Dungeness and Dover. He decided to scramble four more squadrons. When it became apparent that five concentrations of Bf 109s were taking the direct route to London on free-hunting patrols, Park scrambled eight more squadrons. No. 11 Group dispatched Biggin Hill's No. 41 Squadron RAF
No. 41 Squadron RAF
No. 41 Squadron of the Royal Air Force is currently the RAF's Test and Evaluation Squadron , based at RAF Coningsby, Lincolnshire. Its official title is "41 TES". The Squadron celebrates its 95th anniversary in 2011, and is one of the oldest RAF squadrons in existence.-First World War, 1916–1919:No...

 followed by 92 Squadron. The force could put up 20 Spitfires. They were directed to Hornchurch at 20000 ft (6,096 m). At 12:10, Northolt No. 1 (Canadian) and 229 Squadrons sent 21 Hurricanes to Northhold. North Weald sent nine Hurricanes of No. 46 Squadrons to the London Docks. Biggin Hill sent another wave, No. 72 and No. 66 Squadron RAF
No. 66 Squadron RAF
No. 66 Squadron was a Royal Flying Corps and eventually Royal Air Force aircraft squadron.-In World War I:It was first formed at Filton on 30 June 1916 as a Training Squadron equipped with BE2c,d & e, BE12 and Avroe 504A machines. The squadron received its first Sopwith Pup on 3 February 1917,...

, with 20 Spitfires to Biggin Hill at 20000 ft (6,096 m). Debden was called into action again and ordered No. 73 Squadron RAF
No. 73 Squadron RAF
-World War I:It was initially a unit of the Royal Flying Corps and was formed out of the Central Flying School, based at Upavon, Wiltshire. Eight days after, the new unit moved to Lilbourne, near Rugby....

 to Maidstone at 15000 ft (4,572 m). Beginning at 12:15, Kenley dispatched No. 253 Squadron RAF
No. 253 Squadron RAF
RAF 253 Squadron was based at RAF Waterbeach in the two years 1955 to 1957. It flew Vampire and Venom fighter aircraft.253 squadron Nighthawks.Squadron commander wing commander FinlaysonOne Vampire T Mk 11...

 with nine Hurricanes to guard the airfield. RAF Tangmere
RAF Tangmere
RAF Tangmere was a Royal Air Force station famous for its role in the Battle of Britain, located at Tangmere village about 3 miles east of Chichester in West Sussex, England. American RAF pilot Billy Fiske died at Tangmere and was the first American aviator to die during World War II...

 was in action for the first time, sending Nos. 213 and No. 607 Squadron RAF
No. 607 Squadron RAF
No. 607 Squadron was a squadron of the Royal Air Force. It was formed in 1930 as a bomber unit in the Auxiliary Air Force and changed in 1936 to the fighter role. It fought in that role during World War II on the European front and in Asia...

's 23 Hurricanes to defend Kenley and Biggin Hill. The largest contingent came from No. 12 Group. Duxford, or the "Big Wing", No. 19, 242, 302, 310 and 311 Squadrons with 20 Spitfires and 27 Hurricanes were ordered to Hornchurch at 25000 ft (7,620 m). Middle Wallop committed No. 238 Squadron and 12 Hurricanes to the Kenley area.

By the time Park decided to launch his third wave, the first engagements were taking place. At 14:20, he ordered No. 11 Group's No. 303 (Polish) Squadron and its nine Hurricanes to North Holt at 20000 ft (6,096 m). Tangmere scrambled No. 602 Squadron RAF
No. 602 Squadron RAF
No 602 Squadron is a Royal Auxiliary Air Force squadron. Originally formed in 1925 as a light bomber squadron, its role changed in 1938 to army co-operation and in 1939 to that of a fighter squadron....

 and 12 Spitfires to hover over Kenley, Biggin Hill and Gravesend. Meanwhile No. 10 Group RAF
No. 10 Group RAF
No. 10 Group of the Royal Air Force was formed on 1 April 1918 in No. 2 Area. On 8 May of the next year it was transferred to South-Western Area. In 1919 it was transferred to Coastal Area where it remained until it was disbanded on 18 January 1932....

 were ordered into action. A request was made for No. 609 Squadron and 13 Spitfires to climb to 15000 ft (4,572 m) over Kenley. This squadron left Middle Wallop at 14:28.

The RAF now had 276 Spitfires and Hurricanes in the air. The Germans outnumbered the British in this raid by two to one. More seriously, for every two RAF fighters, there were three Bf 109s.

Initial clashes

Over Romney Marsh
Romney Marsh
Romney Marsh is a sparsely populated wetland area in the counties of Kent and East Sussex in the south-east of England. It covers about 100 mi ² .-Quotations:*“As Egypt was the gift of the Nile, this level tract .....

 Nos. 41, 92 and 222 Squadrons engaged JG 26, losing one of their number to the Bf 109s. The second wave of RAF fighters arrived on the scene, comprising 607 and 213 Squadrons with 23 Hurricanes. They initiated a head-on attack against the Do 17s of KG 3. A Hurricane and a Dornier collided, both going down. The Bf 109s did their best to break up attacks and the bombers held a tight formation, putting up withering cross-fire. The Bf 109s were not permitted to leave the bombers and chase enemy fighters. Time and again, they were forced to break off and return to the bomber stream, allowing the RAF fighters to return and repeat the process. Soon after, No. 605 and No. 501 Squadron arrived with 14 Hurricanes. One fighter was hit by return fire, but the pilot aimed his aircraft at a Dornier and bailed out. The fighter collided and destroyed the bomber. The German bomber crews had no way of knowing that the crashes were not premeditated. It seemed as if the British were desperate. Nevertheless, they thought the 'tactic' was devastatingly effective. Chastened by losses, the Dorniers closed ranks to snuff out the gaps and continued to their target.

At 14:31, they reached the Thames and British AAA defences opened up. The bombers were forced to evade their fire. One Dornier was damaged. KG 53 lost a He 111 following up KG 3 over the area.

At 14:35, Park and Churchill watched the battle unfold in Uxbridge's operations room. The Prime Minister asked what reserves were available. Park said there were none. At this point Park was stretched. At Park's request, he had sent all the Squadrons from No. 10 and 12 Group that were adjacent to 11 Group to the capital. If the Luftwaffe launched a follow up attack, there were only three Squadrons available, in 12 and 10 Group (based in Norfolk
Norfolk
Norfolk is a low-lying county in the East of England. It has borders with Lincolnshire to the west, Cambridgeshire to the west and southwest and Suffolk to the south. Its northern and eastern boundaries are the North Sea coast and to the north-west the county is bordered by The Wash. The county...

 and Dorset
Dorset
Dorset , is a county in South West England on the English Channel coast. The county town is Dorchester which is situated in the south. The Hampshire towns of Bournemouth and Christchurch joined the county with the reorganisation of local government in 1974...

) and none in the Kent region. All other day squadrons were based too far away to get involved. Nevertheless, Park knew that a low cloud base over RAF Croydon (2000 ft (609.6 m)), Hornchurch (3000 ft (914.4 m)), Northolt (3500 ft (1,066.8 m)), RAF Hendon (2100 ft (640.1 m)) and Biggin Hill (2000 ft (609.6 m)) would make a low-level accurate strike the Germans' only option. High-altitude attacks were improbable. Possibly to create a reserve, Park ordered 41, 213 and 605 Squadrons to return early though they had only been airborne for 45 minutes and had plenty of fuel left, even if ammunition was short. The vast bulk of the remaining squadrons were heading to London. A total of 185 fighters in 19 Squadrons were ready to engage. The battle would involve over 600 aircraft.

Main battle

In the vicinity of Gravesend
Gravesend, Kent
Gravesend is a town in northwest Kent, England, on the south bank of the Thames, opposite Tilbury in Essex. It is the administrative town of the Borough of Gravesham and, because of its geographical position, has always had an important role to play in the history and communications of this part of...

, the right-hand German formation comprising KG 3 and its trailing He 111s of KG 26 would bear the brunt of the next attack from 63 fighters from Nos 17, 46, 249, 257, 504 and 603 Squadrons. Nos. 249 and 504 Hurricanes went into action first. The first pass saw three Do 17s go down, including Ernst Peuttmann leading 5th Staffel (Squadron). The Bf 109s escorting KG 26 could only watch, forbidden to leave their Heinkel charges. As the first attack finished, No. 257 Squadron led by Squadron Leader
Squadron Leader
Squadron Leader is a commissioned rank in the Royal Air Force and the air forces of many countries which have historical British influence. It is also sometimes used as the English translation of an equivalent rank in countries which have a non-English air force-specific rank structure. In these...

 Robert Stanford Tuck
Robert Stanford Tuck
Wing Commander Roland Robert Stanford Tuck DSO, DFC & Two Bars, AFC was a British fighter pilot and test pilot.Tuck joined the RAF in 1935. Tuck first engaged in combat during the Battle of France, over Dunkirk, claiming his first victories...

 attacked the Heinkels with nine Hurricanes. The escorts had their work cut out and were scattered. No. 257 targeted the badly protected bombers.

As 257 engaged KG 26, KG 53 came under attack from No. 1 (Canadian), 66, 72, 229 Squadrons. No. 66 attacked first followed by 72 and 229. Some Spitfires climbed over the bombers to seek cover from the Bf 109s. The British were surprised to see an unidentified formation of Bf 109s continue on without interfering. Two He 111s were forced back to France and another was shot down. I./JG 3 had nine Bf 109s providing close escort which eventually turned to protect the bombers. They claimed one Canadian Hurricane and one Spitfire from No. 66 Squadron. KG 2 in the left-hand column came under attack from 23 Hurricanes from Nos. 73, 253 and 303 Squadrons. JG 53 were alert to the danger and shot down one 303 Hurricane and damaged five more. No. 73 Squadron made a head-on attack damaging one bomber.

Meanwhile, Park was hoping for Bader's Wing to turn up and deliver its promised results. As soon as the Duxford Wing did arrive it was intercepted. Arriving between Kenley and Maidstone at varying altitude (15000–16000 ft (4,572–4,876.8 m)), it emerged from cloud in the vicinity of KG 2's stream. Galland's JG 26 was directly above it. In a reversal of their roles, the Hurricanes engaged the Bf 109s while the Spitfires went for the bombers. While they failed to deliver their anti-bomber attacks, they drew in the Bf 109 escorts and free-hunting German fighters making it easier for other RAF fighters to reach the bombers. No. 310 Squadron lost two Hurricanes to JG 26, one to Adolf Galland, as the battle became a confusing mess of combats. By 14:40, the bombers reached London. KG 3 had lost three Do 17s destroyed and two damaged while KG 26 had suffered only one damaged bomber. KG 53 in the central column had lost one and three more forced to turn back owing to battle damage, while only one KG 2 machine had been forced to do the same. Despite the British presence, 100 bombers with 120 tons of bombs prepared to drop their bombs.

One of the reasons the bombers had sustained so little damage was the cloud base. Its density had made it difficult for RAF fighter controllers to direct their squadrons with accuracy. The same cloud that helped shield the bombers was to obscure the target area. Its base started at 2000 ft (609.6 m) and its top reached 12000 ft (3,657.6 m). The bombers reached the Victoria Docks, but it and the other targets were covered. The skies were clear over West Ham
West Ham
West Ham is in the London Borough of Newham in London, England. In the west it is a post-industrial neighbourhood abutting the site of the London Olympic Park and in the east it is mostly residential, consisting of Victorian terraced housing interspersed with higher density post-War social housing...

 and the bombers concentrated on the borough, in particular the Bromley-by-Bow
Bromley-by-Bow
Bromley-by-Bow, historically and officially Bromley, is a place in the London Borough of Tower Hamlets. It is an inner-city district situated east north-east of Charing Cross.-Toponymy:...

 gas works. KG 3, 26 and 53 dropped their bombs at 14:45.

Most of the targeted area was three square miles in extent, bounded on the north by the over ground railway of the District line
District Line
The District line is a line of the London Underground, coloured green on the Tube map. It is a "sub-surface" line, running through the central area in shallow cut-and-cover tunnels. It is the busiest of the sub-surface lines. Out of the 60 stations served, 25 are underground...

, on the west by the River Lea, on the east by the Plaistow Marshes and on the south by the Royal Victoria Dock. The gas works were targeted by KG 26. Heavy high explosive bombs severely damaged the plant. Upton Park tube station
Upton Park tube station
Upton Park station is a London Underground station on the District and Hammersmith and City lines, on Green Street in the Upton Park area of the London Borough of Newham, east London. It is in Zone 3....

 was also hit and an electric sub-station was hit causing a black out. Residential areas were badly damaged. KG 2 was unable to find the Surrey Commercial Docks
Surrey Commercial Docks
The Surrey Commercial Docks were a large group of docks in Rotherhithe on the south bank of the Thames in South East London. The docks operated in one form or another from 1696 to 1969...

. It turned away and dropped its bombs over a wide area. According to West Ham borough records, 17 people were killed, or died of wounds sustained in the attack. Another 92 were seriously injured, while 40 were slightly injured.

As the Germans retreated back out over the channel, some bomber groups scattered while others formed uneven formations and were pursued by RAF fighters. With fuel dwindling, the Bf 109s headed back to France, unable to help the hard-pressed bombers.

The German bombers that had been forced out of formation attempted to make it to France using the cloud as cover. However virtually all were destroyed. Four Do 17s and six He 111s were shot down by fighters that were now swarming over Kentish air space. The main formations withdrew as more RAF squadrons closed in. The escort plan held up, and 50 Bf 109s met the withdrawing units. Still, there were gaps in the formation. Nos. 238, 602 and 609 Squadrons exploited them. No. 238 Hurricanes engaged KG 53 while the others shot down two Do 17s from KG 2. Bader's squadron also took part shooting down one Dornier. Two RAF fighters were lost to the escorts. Another source indicated the German fighters sent to cover the retreat made little impact and were hardly noticed by RAF fighters. It appears I./ Lehrgeschwader 1
Lehrgeschwader 1
Lehrgeschwader 1 formerly Lehrgeschwader Greifswald was a Luftwaffe multi-purpose unit during World War II, operating fighter, bomber and dive-bomber Gruppen. The unit was formed in July 1936...

(LG 1) formed part of the withdrawal force. It lost three Bf 110s to No. 303 (Polish) Squadron RAF at 15:50. No. 303 Squadron claimed three Dorniers and two Bf 110s while No. 602 claimed seven bombers and two fighters. Still, the RAF grossly over claimed German losses. They claimed 77 bombers and 29 fighters.
German losses on that raid had been heavy. KG 2 had lost eight Do 17s and seven damaged. Personnel losses of the unit amounted to 19 crew killed, nine captured and 10 wounded. KG 3 had fared little better, losing six destroyed and four damaged. Personnel losses in II./KG 3, 15 were killed, 10 were captured and four were wounded. The He 111s were to suffer lightly. One He 111 was lost, its crew was captured. Three more were damaged and two crewmen were wounded. KG 53 lost six Heinkels with another two damaged. It lost 12 aircrew killed, 18 captured and four wounded including Major Max Gruber, II./KG 53's Gruppenkommandeur
Gruppenkommandeur
Gruppenkommandeur is a Luftwaffe position , that is the equivalent of a commander of a group or wing in other air forces. Gruppenkommandeur usually has the rank of Hauptmann or Major, and commands a Gruppe, which is a sub-division of a Geschwader. A Gruppe usually consists of three or four...

(Group Commander). The German fighter screen suffered as well. In the battle, JG 51 lost two Bf 109s, JG 52 a single Bf 109, JG 53 lost seven Bf 109s and one damaged, JG 77 lost one and one damaged, while LG 2 lost two Bf 109s. Having lost two Bf 109s in the first raid, two more were lost owing to the pilots running out of fuel or being shot down in combat.

In total, the Luftwaffe had lost 21 bombers destroyed, and scores damaged. It also lost at least 12 fighters. The RAF had lost 15 fighters destroyed while 21 were damaged. Another source puts German fighter losses at 23.

From 15:00, III./Kampfgeschwader 55
Kampfgeschwader 55
Kampfgeschwader 55 "Greif" was a Luftwaffe bomber unit during World War II. The unit was one of the most famous in the Luftwaffe. The Heinkel He111 medium bomber was the standard bomber for this unit from its conception through to the last days of the war.- History :On 1 April 1934 a unit called...

(KG 55) took off from Villacoublay led by Major Schlemell. It headed towards Southampton
Southampton
Southampton is the largest city in the county of Hampshire on the south coast of England, and is situated south-west of London and north-west of Portsmouth. Southampton is a major port and the closest city to the New Forest...

 before diverting to bomb Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 targets at Portland
Portland Harbour
Portland Harbour is located beside the Isle of Portland, off Dorset, on the south coast of England. It is one of the largest man-made harbours in the world. Grid reference: .-History:...

. British radar reported them as six intruders. There were actually more than 20 He 111s without fighter escort. They were intercepted by six Spitfires from No. 152 Squadron from RAF Warmwell
RAF Warmwell
RAF Warmwell was a Royal Air Force station near Warmwell in Dorset, England from 1937 to 1946, located about 5 miles east-southeast of Dorchester; 100 miles southwest of London....

. The bombers dropped their ordnance but only five fell among naval installations causing minor damage. The RAF fighters claimed one destroyed and another damaged. KG 55 9 Staffel lost one He 111P-2 (one survivor) and 8 Staffel suffered one bomber damaged and one of the crew killed.

Evening and night actions

There was one more noteworthy operation before the Germans ceased their attacks for the day. At 17:40, 20 aircraft from Erprobungsgruppe 210 took off. It was picked up just off the Cherbourg peninsula as it made its way across the central Channel to the Isle of Wight
Isle of Wight
The Isle of Wight is a county and the largest island of England, located in the English Channel, on average about 2–4 miles off the south coast of the county of Hampshire, separated from the mainland by a strait called the Solent...

. By 17:50, it had reached St. Catherine's Point. Nos. 213 and 602 Squadrons were patrolling nearby at Tangmere, where they were kept for the duration of the raid. No. 607 Squadron, also from Tangmere, was flying to the airfield over Southampton at 15000 ft (4,572 m) and No. 609 Squadron was on its way from Middle Wallop to patrol Portsmouth. At 18:00, by which time the German operation was virtually over, the British dispositions were completed when No. 238 Squadron took off from Middle Wallop took off to patrol the airfield.

The German target was the Spitfire factory at Woolston. They arrived near it at 17:55. The Southampton guns engaged them for the entire time over the target. When the Germans retired, RAF fighters appeared. Fortunately, the Germans missed the factory. They did manage to rupture a number of gas and water mains whilst damaging nearby residential areas. There was slight damage done to the shipbuilding yard in Southampton Harbour. According to German records, 10–11 t (11–12.1 ST) of bombs were dropped. Had they succeeded in hitting the Spitfire factory, they could have seriously retarded British production. As it was, nine civilians were killed, 10 seriously injured, and 23 slightly injured in the attack.

The make up of the formation is unclear. An eye-witness, air enthusiast Alexander McKee, 22, was drinking tea at a cafe in Stoneham
Swaythling
Swaythling was once a village but over the years it has gradually become a suburb and electoral ward of Southampton in Hampshire, England. The ward has a population of 13,394....

 when the attack began:
....I went outside on hearing enemy planes. I counted them aloud. Ten. They dived straight on Southampton, without any preliminaries, through a barrage of gunfire, one after the other. Alfred saw a bomb released, then handed the glasses (Binoculars
Binoculars
Binoculars, field glasses or binocular telescopes are a pair of identical or mirror-symmetrical telescopes mounted side-by-side and aligned to point accurately in the same direction, allowing the viewer to use both eyes when viewing distant objects...

) to me. The aircraft had twin-rudders, and might have been Dorniers or Jaguars [a bomber version of the Bf 110 thought to in use at the time]. The dives were fast but shallow, and they pulled out of them at about 2,000 feet. It was not a dive-bombing attack proper. Soldiers passing made inane remarks about 'nothing could live in that barrage', although the Germans were living in it, too. The barrage was quite good, but none of the Huns were brought down....Very quickly and efficiently the Germans re-formed and disappeared into the cloud. I have never seen a better bit of flying than those Nazi pilots [sic - German] put up - they got into formation like a well-drilled team, in the teeth of guns.


Nos. 607 and 609 Squadrons engaged the Germans south-west of The Needles
The Needles
The Needles is a row of three distinctive stacks of chalk that rise out of the sea off the western extremity of the Isle of Wight, England, close to Alum Bay. The Needles lighthouse stands at the end of the formation...

. The British reported 30-40 Bf 110s with 15 Do 17s in support. The tonnage of bombs dropped suggested there were fewer bombers than claimed. The RAF fighters claimed four Do 17s. The fact remains that the Germans penetrated the airspace without interception and came very close to inflicting critical damage to the Spitfire factory. The radar had done its job and alerted No. 11 and 10 Group 20 minutes before the bombs started to fall. The fault lay either with the No. 10 or 11 Group controllers who were late in ordering their Squadrons to scramble.

More interceptions took place in the evening. The interception of two separate He 111s near London at 19:00 signalled the last engagement of daylight. It is likely they were on reconnaissance missions to assess the damage done in the attacks. The interception was made by No. 66 Squadron RAF. One of the He 111s was chased out to sea and was last seen flying on one engine. It was likely to have belonged to I./Kampfgeschwader 1
Kampfgeschwader 1
Kampfgeschwader 1 was a Luftwaffe bomber unit during the Second World War. Heinkel He 111 and later Heinkel He 177 bombers.-History:...

(KG 1), which reported one He 111 destroyed upon crash landing back in France after combat.

Small groups of German bombers attempted to attack London in the afternoon, causing little damage. II./Kampfgeschwader 4
Kampfgeschwader 4
Kampfgeschwader 4 "General Wever" was a Luftwaffe bomber unit during World War II. The unit was formed in May 1939. The unit operated the Dornier Do 17, Junkers Ju 88 and Heinkel He 111 medium bombers, with later service on the Heinkel He 177 heavy bomber...

(KG 4) had one He 111 crash land near Eindhoven after combat with the crew unhurt. The bomber was 30 percent damaged. 6 Staffel Kampfgeschwader 30
Kampfgeschwader 30
-Service history:Formed on 15 November 1939 in Greifswald. I Gruppe formed 1 September, II Gruppe on 23 September and III Gruppe on 1 January 1940, based in Greifswald then Barth...

(KG 30) lost one Junkers Ju 88
Junkers Ju 88
The Junkers Ju 88 was a World War II German Luftwaffe twin-engine, multi-role aircraft. Designed by Hugo Junkers' company through the services of two American aviation engineers in the mid-1930s, it suffered from a number of technical problems during the later stages of its development and early...

 to fighters when it crashed in France and another force landed after combat. I. and II./Kampfgeschwader 51
Kampfgeschwader 51
Kampfgeschwader 51 "Edelweiss" was a Luftwaffe bomber unit during World War II. The unit began forming in December 1939. The unit operated the Dornier Do 17, Heinkel He 111 and Junkers Ju 88 light and medium bombers...

(KG 51) lost one Ju 88 each and another damaged. In the lost Ju 88s, all crews were reported missing.

Kampfgeschwader 27
Kampfgeschwader 27
Kampfgeschwader 27 “Boelcke” was a Luftwaffe medium bomber wing of the Second World War.- Formation :Formed on 1 May 1939, the Stab and I Gruppe were based in Hanover-Langenhagen, with II and III Gruppe at Wunstorf...

(KG 27) bombed Liverpool during the night at 10:48. Widespread damage was caused in the city and neighbouring Birkenhead
Birkenhead
Birkenhead is a town within the Metropolitan Borough of Wirral in Merseyside, England. It is on the Wirral Peninsula, along the west bank of the River Mersey, opposite the city of Liverpool...

, but only nine casualties were inflicted. Elsewhere damage was reported at Eastbourne
Eastbourne
Eastbourne is a large town and borough in East Sussex, on the south coast of England between Brighton and Hastings. The town is situated at the eastern end of the chalk South Downs alongside the high cliff at Beachy Head...

, Worthing
Worthing
Worthing is a large seaside town with borough status in West Sussex, within the historic County of Sussex, forming part of the Brighton/Worthing/Littlehampton conurbation. It is situated at the foot of the South Downs, west of Brighton, and east of the county town of Chichester...

, Bournemouth
Bournemouth
Bournemouth is a large coastal resort town in the ceremonial county of Dorset, England. According to the 2001 Census the town has a population of 163,444, making it the largest settlement in Dorset. It is also the largest settlement between Southampton and Plymouth...

, Cardiff
Cardiff
Cardiff is the capital, largest city and most populous county of Wales and the 10th largest city in the United Kingdom. The city is Wales' chief commercial centre, the base for most national cultural and sporting institutions, the Welsh national media, and the seat of the National Assembly for...

, Avonmouth
Avonmouth
Avonmouth is a port and suburb of Bristol, England, located on the Severn Estuary, at the mouth of the River Avon.The council ward of Avonmouth also includes Shirehampton and the western end of Lawrence Weston.- Geography :...

, Manchester
Manchester
Manchester is a city and metropolitan borough in Greater Manchester, England. According to the Office for National Statistics, the 2010 mid-year population estimate for Manchester was 498,800. Manchester lies within one of the UK's largest metropolitan areas, the metropolitan county of Greater...

, Warrington
Warrington
Warrington is a town, borough and unitary authority area of Cheshire, England. It stands on the banks of the River Mersey, which is tidal to the west of the weir at Howley. It lies 16 miles east of Liverpool, 19 miles west of Manchester and 8 miles south of St Helens...

, Bootle
Bootle
Bootle is a town within the Metropolitan Borough of Sefton in Merseyside, England, and a 'Post town' in the L postcode area. Formally known as Bootle-cum-Linacre, the town is 4 miles  to the north of Liverpool city centre, and has a total resident population of 77,640.Historically part of...

 and Preston. RAF night fighters flew 64 sorties and intercepted two bombers. Neither the fighters or ground defences claimed any successes.

Overclaiming and propaganda

Over claiming in aerial warfare is not uncommon. During the Second World War, pilots often claimed more aircraft shot down than was actually the case. The Air Ministry
Air Ministry
The Air Ministry was a department of the British Government with the responsibility of managing the affairs of the Royal Air Force, that existed from 1918 to 1964...

 released a press statement on 15 September that 175–185 German aircraft had been shot down. The actual number of aircraft destroyed was ⅔ lower and significantly less than the number of German losses on 15 and 18 August (The Hardest Day
The Hardest Day
The Hardest Day was the name of a Second World War air battle fought during the Battle of Britain on 18 August 1940, by the Luftwaffe and British Royal Air Force . By June 1940 the Allies had been defeated in Western Europe and Scandinavia...

), in which the Luftwaffe lost 75 and 69 respectively.

At 20:00, Churchill, who had returned to 10 Downing Street
10 Downing Street
10 Downing Street, colloquially known in the United Kingdom as "Number 10", is the headquarters of Her Majesty's Government and the official residence and office of the First Lord of the Treasury, who is now always the Prime Minister....

, was awoken. He received bad news from the navy. In the Atlantic sinking of shipping had been bad, but his Secretary informed him that all had been redeemed in the day's air battle. He was told the RAF had downed 183 enemy aircraft for under 40 losses.

On 16 September, a British flying boat
Flying boat
A flying boat is a fixed-winged seaplane with a hull, allowing it to land on water. It differs from a float plane as it uses a purpose-designed fuselage which can float, granting the aircraft buoyancy. Flying boats may be stabilized by under-wing floats or by wing-like projections from the fuselage...

 arrived in New York
New York
New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

 delivering news of a "record bag" of 185 enemy aircraft. The German Embassy tried in vain to correct the total. The Germans were ignored and the New York Times ran several excited stories calling for a military alliance with Britain and her Commonwealth.

The Germans were slower in putting their story together. On 17 September, the Nazi Party newspaper Völkischer Beobachter
Völkischer Beobachter
The Völkischer Beobachter was the newspaper of the National Socialist German Workers' Party from 1920. It first appeared weekly, then daily from February 8, 1923...

announced that attacks had caused considerable damage to London. It claimed the Luftwaffe destroyed 79 RAF aircraft for 43 losses. This was also a severe over claim. RAF losses amounted to 29 fighters.

AOC 11 Group Keith Park was livid with the claim returns. As far as he was concerned, claiming 200 on one day was nonsense. He placed particular blame on Leigh-Mallory's Big Wing which had claimed one third, around 60, of the 185 'victories' (total claims were 81 in the morning and 104 in the afternoon). More damage should have been done to German bombers inbound to the target rather than destroying stragglers that were no military threat as they made their way to the coast. He complained that there were too many inexperienced leaders and interceptions were being missed. Things needed "tightening up", that was Park's lesson for 15 September. Park was aware the ratio of losses was 2:1 in the British favour. It had been a decent performance, but not Fighter Command's best.

Evaluation of the day's events

In the two main engagements, the fighter losses had been about equal. The big difference was the bombers losses. Fighter Command had had greater success against the afternoon attack rather than the morning assault, which it out numbered 2:1. The ratio of German fighters to bombers had been 3:1 in the morning but 5:1 in the afternoon, so there were more targets. The more bombers Kesselring sent, the more were lost.

Kesselring was back where he started. Park's handling of the actions was a masterpiece of aggressive defence, yet he was not under the same pressure as he had been in the battles during August when air battles were so confusing they were hard to control. A big set-piece offensive played into his hands.

Leigh-Mallory claimed the Big Wings had destroyed entire formations of enemy aircraft upon seeing them. He even claimed the RAF outnumbered their opponents in several engagements. In the afternoon battle, he claimed that the Wing could not get into position to break up the bombers in time and was intercepted by German fighters. Still, while that was true he also claimed his units had shot down 105 enemy aircraft and probably destroyed a further 40. He claimed damaged another 18 for the loss of 14 and six pilots.

The claims were a massive exaggeration. But while the Big Wing had proven physically ineffective for the most part, its biggest contribution to the day had been its use as a psychological weapon. The German bomber units that had seen the Big Wing form up were quite shocked, and those crews in the badly hit units, including KG 2 and KG 3, that had witnessed head-on collisions with German aircraft were badly shaken.

A German victory on the Battle of Britain Day was unlikely. It could only have been possible if Park had made crass errors and had been caught on the ground. Stephen Bungay
Stephen Bungay
Stephen Bungay is a British management consultant, historian and author who has made a special study of the Battle of Britain.He read Modern Languages at Oxford, where he received an MA with First Class Honours. He subsequently studied for a doctorate in philosophy at Oxford and the University of...

 postulates that even had the loss rates been reversed, Dowding could have replaced those with reinforcements from his C units and carried on. Moreover, during both major engagements Fighter Command had used less than ½ of its strength. It would have been able to meet the Luftwaffe again on the morrow.

Hermann Göring
Hermann Göring
Hermann Wilhelm Göring, was a German politician, military leader, and a leading member of the Nazi Party. He was a veteran of World War I as an ace fighter pilot, and a recipient of the coveted Pour le Mérite, also known as "The Blue Max"...

 met his staff at Karinhall the following day for a conference. Their assessments of the air battle verged on pure fantasy. They concluded the RAF had withdrawn all available fighter units from all over the country to concentrate of London. The fact that the Western afternoon raids against ports were uncontested led them to believe the enemy was breaking. Another four or five days, they thought, would be sure to break them.

The OKL believed that the British were down to their last 300 fighters, with only 250 being produced. To stop fighter production, factories in Bristol were to be attacked. London was also to subject to round the clock bombing.
Theo Osterkamp
Theo Osterkamp
Theodor "Theo" Osterkamp was a World War I and World War II Luftwaffe fighter ace. He flew in the first World War, scoring 32 victories...

 pointed to the massed formations used by the British (Big Wing), and put their use down to the ineffectiveness of the 15 September raids. Göring was delighted with the news that the British were committing mass formations to battle. The Big Wing's use would allow the German fighters to engage and destroy RAF fighters in large numbers. However, the Germans had not realised this stratagem was by no means the uniform strategy in Fighter Command. Nevertheless, the OKL were still confident of victory. It blamed the bad weather and RAF's last-minute change of strategy for prolonging summer operations. Still, the Luftwaffe bomber crews were ordered to prepare winter quarters. The campaign turned to London for the duration of 1940. It would witness some large-scale daylight air battles, but it gradually turned to a campaign by night. It would become known as The Blitz
The Blitz
The Blitz was the sustained strategic bombing of Britain by Nazi Germany between 7 September 1940 and 10 May 1941, during the Second World War. The city of London was bombed by the Luftwaffe for 76 consecutive nights and many towns and cities across the country followed...

.

Hitler's reaction

Hitler did not seem overly bothered with the outcome of the air battle. For him, Sea Lion had also been a huge risk, even with air superiority, and he had been convinced since the end of August the Luftwaffe would not achieve it anyway. The war with Britain would have to go on. He would maintain the threat of invasion until 1941 through the use of strategic bombing. Then, he would turn against the Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 and eliminate Britain's last possible ally in Europe. With the Soviets defeated, he believed the British would negotiate. On 17 September, he sent out a directive to the three armed services informing them of Sea Lion delay. On this date the date for S-Day had been the 21 September. It was now postponed until further notice. It is likely that Hitler did not want to gamble his new-found military prestige by launching a hazardous venture across the Channel unless the Luftwaffe had crushed all opposition. At the beginning of December 1940, Hitler told the Oberkommando der Wehrmacht
Oberkommando der Wehrmacht
The Oberkommando der Wehrmacht was part of the command structure of the armed forces of Nazi Germany during World War II.- Genesis :...

(OKW) that they could forget Sea Lion, although he did not formally cancel the operation until the 3 March 1942.

Göring had never believed in Sea Lion, while Hitler had never believed Adler could achieve victory without Sea Lion. Both went their own ways. Hitler needed someone to keep up the pressure on Britain, and Göring was willing to do it. On 19 September, Hitler ordered that no further barges were to be added to Sea Lion ports, but those under assembly were to continue. But the damage being done by RAF Bomber Command
RAF Bomber Command
RAF Bomber Command controlled the RAF's bomber forces from 1936 to 1968. During World War II the command destroyed a significant proportion of Nazi Germany's industries and many German cities, and in the 1960s stood at the peak of its postwar military power with the V bombers and a supplemental...

 now meant sustaining the army in readiness was becoming a strain. The invasion forces were broken up and moved East on the understanding it could be reassembled with only three weeks notice.

Strategic overview

There was no clear solution to combating Britain from the air. Göring had not given up hope of winning a victory by airborne assault. He discussed the possibility of invading Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 (Fall Grün, or Operation Green
Operation Green (Ireland)
Operation Green often also referred to as Case Green or Plan Green , was a full scale operations plan for a German invasion of Ireland in support of Operation Sea Lion . Despite its detailed nature, Green is thought to have been designed only as a credible threat, a feint, not an actual operation...

) with Kurt Student
Kurt Student
Kurt Student was a German Luftwaffe general who fought as a fighter pilot during the First World War and as the commander of German Fallschirmjäger during the Second World War.-Biography:...

 in January 1941, in order to surround Britain by land, sea and air. The operation was shelved. Instead, the Luftwaffe, with varying degrees of success, carried out the strategic bombardment of British industrial cities. The lack of RAF night defences in this stage of the war enabled the German bombers to inflict extensive damage without suffering the heavy losses of the daylight campaign. It is estimated that the Luftwaffe lost around 500 aircrews during the Blitz in comparison to the Battle of Britain in which it lost around 2,800 killed, 340 wounded, 750 captured. Overall losses were cut by one-third of daylight operations.

Still, perennial problems with spares meant serviceability rates remained at about 50%. The Luftwaffes bomber crews had never been trained for bad weather or night operations. To support them, navigation aids in the form of Knickebein (Crooked Leg) were made available. They allowed German crews to navigate effectively to their targets. For the most part, crews were confident in using them, with the exception of poorer quality replacement crews. These systems were responsible for a few very successful attacks, such as the Coventry operation
Coventry Blitz
The Coventry blitz was a series of bombing raids that took place in the English city of Coventry. The city was bombed many times during the Second World War by the German Air Force...

 on 14 November. Operations against Liverpool
Liverpool Blitz
The Liverpool Blitz was the heavy and sustained bombing of the British city of Liverpool and its surrounding area, at the time mostly within the counties of Lancashire and Cheshire but commonly known as Merseyside, during the Second World War by the German Luftwaffe.Liverpool, Bootle, and the...

 were also successful. Some 75% of the ports capacity was reduced at one point, and it lost 39126 LT (39,754 t) of shipping to air attacks, with another 111601 LT (113,392.2 t) damaged. Minister of Home Security
Ministry of Home Security
The Ministry of Home Security was a British government department established in 1939 to direct national civil defence during the Second World War.-Background:...

 Herbert Morrison
Herbert Morrison
Herbert Stanley Morrison, Baron Morrison of Lambeth, CH, PC was a British Labour politician; he held a various number of senior positions in the Cabinet, including Home Secretary, Foreign Secretary and Deputy Prime Minister.-Early life:Morrison was the son of a police constable and was born in...

 was also worried that morale was breaking, noting the defeatism expressed by civilians. Operations against London up until May 1941 could also have a severe impact on morale.

The campaigns' ultimate limitation was the poor formulation of military strategy. The types of targets selected from one operation to the next differed radically and no sustained pressure was put under any one type of British target. The Luftwaffes strategy became increasingly aimless. Disputes among the OKL staff revolved more around tactics than strategy. This method condemned the offensive over Britain to failure before it had begun.

The end result of the air campaign against Britain in 1940 and 1941 was a decisive failure to end the war. As Hitler committed Germany to ever increasing military adventures, the Wehrmacht
Wehrmacht
The Wehrmacht – from , to defend and , the might/power) were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the Heer , the Kriegsmarine and the Luftwaffe .-Origin and use of the term:...

became increasingly overstretched and was unable to cope with a multi-front war. By 1944, the Allies were ready to launch Operation Overlord
Operation Overlord
Operation Overlord was the code name for the Battle of Normandy, the operation that launched the invasion of German-occupied western Europe during World War II by Allied forces. The operation commenced on 6 June 1944 with the Normandy landings...

, the invasion of Western Europe
Western Europe
Western Europe is a loose term for the collection of countries in the western most region of the European continents, though this definition is context-dependent and carries cultural and political connotations. One definition describes Western Europe as a geographic entity—the region lying in the...

. The Battle of Britain ensured that the Western Allies had a base from which to launch the campaign and that there would be a Western Allied presence on the battlefield to meet the Soviet Red Army
Red Army
The Workers' and Peasants' Red Army started out as the Soviet Union's revolutionary communist combat groups during the Russian Civil War of 1918-1922. It grew into the national army of the Soviet Union. By the 1930s the Red Army was among the largest armies in history.The "Red Army" name refers to...

in central Europe at the end of the war in May 1945.
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