Admiral Sir John Fitzroy Duyland Bush GCB DSC** (1 November 1914 – 10 May 2013) was a British Royal Navy officer who served as Commander-in-Chief Western Fleet.

Educated at Clifton College,[1] Bush was commissioned into the Royal Navy and served in World War II.

[2] He became Commanding officer of the destroyer HMS Undine as well as Captain of the 6th Frigate Squadron in 1955, Flag Officer (Flotillas) in the Mediterranean Fleet in 1961[3] and then Commander of the British Naval staff in Washington D. C. in 1962.

[4] In January 1967 he led a British delegation to South Africa to renegotiate the Simonstown Agreement.

[5] He was appointed Vice Chief of the Naval Staff in 1965[6] and the first Commander-in-Chief Western Fleet in 1967.