1782 Charles Watson-Wentworth, 2nd Marquess of Rockingham becomes Prime Minister of the United Kingdom.
1943 World War II: British Prime Minister Winston Churchill and U.S. President Franklin D. Roosevelt set Monday, May 1, 1944 as the date for the Normandy landings ("D-Day"). It would later be delayed over a month due to bad weather.
1943 British Overseas Airways Corporation Flight 777 is shot down over the Bay of Biscay by German Junkers Ju 88s, killing actor Leslie Howard and leading to speculation the downing was an attempt to kill British Prime Minister Winston Churchill.
1945 World War II: the leaders of the three Allied nations, Prime Minister of the United Kingdom Winston Churchill, President of the United States Harry S Truman and Soviet Premier Joseph Stalin, meet in the German city of Potsdam to decide the future of a defeated Germany.
1955 Winston Churchill resigns as Prime Minister of the United Kingdom amid indications of failing health.
1960 British Prime Minister Harold Macmillan speaks of the "a wind of change" of increasing national consciousness blowing through colonial Africa, signalling that his Government was likely to support decolonisation.
1974 The house of former British Prime Minister Ted Heath is attacked by members of the Provisional IRA.
1978 British Prime Minister James Callaghan announces that he will not call a general election for October, considered to be a major political blunder (see Winter of Discontent, United Kingdom general election, 1979)
1979 Margaret Thatcher becomes the first female Prime Minister of the United Kingdom.
1984 Brighton hotel bombing: The Provisional Irish Republican Army attempt to assassinate Prime Minister Margaret Thatcher and her cabinet. Thatcher escapes but the bomb kills five people and wounds 31.