The British 5th Destroyer Flotilla, or Fifth Destroyer Flotilla, was a naval formation of the Royal Navy from 1910 to 1942 and again from 1947 to 1951.

Admiral of the Fleet Albert Victor Nicholas Louis Francis Mountbatten, 1st Earl Mountbatten of Burma was a British statesman, naval officer, colonial administrator and close relative of the British royal family. He was born in the United Kingdom to the prominent Battenberg family. He was a maternal uncle of Prince Philip, Duke of Edinburgh, and a second cousin of King George VI. He joined the Royal Navy during the First World War and was appointed Supreme Allied Commander, South East Asia Command, in the Second World War. He later served as the last Viceroy of India and briefly as the first Governor-General of the Dominion of India.