HMS Ace (P414) was the name allocated to an of 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...

 which was laid down on 3 December 1943 and launched at Devonport Dockyard

HMNB Devonport

Her Majesty's Naval Base Devonport , is one of three operating bases in the United Kingdom for the Royal Navy . HMNB Devonport is located in Devonport, in the west of the city of Plymouth in Devon, England...

 on 14 March 1945 during the Second World War.

She was not completed because the end of the war intervened. However the hull was used for crush depth testing before arrival in June 1950 to Messrs. Smith & Houston of Port Glasgow

Port Glasgow

Port Glasgow is the second largest town in the Inverclyde council area of Scotland. The population according to the 1991 census for Port Glasgow was 19426 persons and in the 2001 census was 16617 persons...

, Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

to be broken up.