Admiral of the Fleet Sir Roger Roland Charles Backhouse, was a Royal Navy officer. He served in the First World War as a cruiser commander and after the war became a battle squadron commander and later Commander-in-Chief, Home Fleet. Becoming First Sea Lord in November 1938, his major contribution in that role was to abandon the official British policy of sending a major fleet to Singapore to deter Japanese aggression, realising the immediate threat was closer to home and that such a policy was no longer viable. He died from a brain tumour in July 1939 just before the outbreak of the Second World War.

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.