Admiral of the Fleet Bruce Austin Fraser, 1st Baron Fraser of North Cape, was a senior Royal Navy officer. He served in the First World War, saw action during the Gallipoli Campaign and took part in the internment of the German High Seas Fleet at the end of the war. He also served in the Second World War initially as Third Sea Lord and Controller of the Navy and then as second-in-command and afterwards as commander of the Home Fleet, leading the force that destroyed the German battleship Scharnhorst. He went on to be First Sea Lord and Chief of the Naval Staff in which role he assisted in establishing NATO and agreed to the principle that the Supreme Allied Commander Atlantic should be an American admiral, in the face of fierce British opposition.

Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy, formally established in 1688. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a Marshal of the Royal Air Force. Apart from honorary appointments, no new admirals of the fleet have been named since 1995, and no honorary appointments have been made since 2014.