Vice Admiral Sir Peveril Barton Reiby Wallop William-Powlett, KCB, KCMG, CBE, DSO (5 March 1898 – 10 November 1985) was a Royal Navy officer who served as Commander-in-Chief, South Atlantic Station from 1952 to 1954.

[2] He joined the Royal Navy as a midshipman in 1914 and served in the First World War, specialising in signals.

[4] He saw service with the New Zealand Division from 1931 to 1936 and then commanded the cadet training ship HMS Frobisher in 1939.

[5] William-Powlett served in the Second World War as Director of Manning at the Admiralty and then commanded the cruiser HMS Fiji, which was sunk during the Battle of Crete in 1941.

[3] He was appointed Chief of Staff of Force H at Gibraltar in 1941 and then commanded HMS Newcastle from 1942.