Admiral of the Fleet Michael Cecil Boyce, Baron Boyce, was a British Royal Navy officer who also sat as a crossbench member of the House of Lords until his death in November 2022.
Admiral of the Fleet Sir David Benjamin Bathurst, is a former Royal Navy officer. He is the only living person, apart from King Charles III, holding the rank of Admiral of the Fleet in the Royal Navy since the death of Lord Boyce. After training as a pilot and qualifying as a helicopter instructor, Bathurst commanded a Naval Air Squadron and then two frigates before achieving higher command in the navy. He served as First Sea Lord and Chief of the Naval Staff from 1993 to 1995: in that capacity he advised the British Government on the deployment of Naval Support including Sea Harriers during the Bosnian War.
Admiral Sir John Cunningham Kirkwood Slater,, known as Jock Slater, is a retired Royal Navy officer. He commanded a minesweeper, a frigate and then a destroyer before taking over the aircraft carrier HMS Illustrious and then achieving higher command in the Navy. He served as First Sea Lord and Chief of the Naval Staff from 1995 to 1998: in that capacity he played a key role in the 1998 Strategic Defence Review carried out by the Labour Government that had come to power a year earlier.
Admiral of the Fleet John David Elliott Fieldhouse, Baron Fieldhouse, was a Royal Navy officer. He commanded five submarines and a frigate before achieving higher command from the 1970s. Following the invasion of the Falkland Islands by Argentine forces in April 1982, Fieldhouse was appointed Commander of the Task Force given responsibility for "Operation Corporate", the mission to recover the Falkland Islands. The campaign ended in the surrender of Argentine forces in June 1982. He became First Sea Lord and Chief of Naval Staff in December that year and, in that role, persuaded the British Government to fund the replacement of ships lost in the Falklands War. He went on to be Chief of the Defence Staff from 1985 until his retirement in 1988.
Admiral of the Fleet Terence Thornton Lewin, Baron Lewin, was a Royal Navy officer. He served in the Second World War and then commanded a destroyer, the Royal yacht, two frigates and an aircraft carrier before achieving higher command. He was First Sea Lord and Chief of the Naval Staff in the late 1970s and in that role he worked hard to secure a decent wage for servicemen and helped win them a 32% pay rise. He went on to be Chief of the Defence Staff during the Falklands War, serving as chief war planner and as Prime Minister Margaret Thatcher's chief advisor during the war. He was also the first Chief of Defence Staff to act as head of the Armed Forces rather than just Chairman of the Chiefs of Staff Committee.
Admiral of the Fleet Sir Edward Beckwith Ashmore, was a senior Royal Navy officer. He saw active service in the Second World War and later commanded two frigates before achieving high command in the Navy. He served as First Sea Lord and Chief of the Naval Staff in the mid-1970s and in that role he advised the incoming Labour government on a major defence review and on the implications of the Turkish invasion of Cyprus. He went on to be acting Chief of the Defence Staff, serving briefly in a caretaker capacity following the death of his predecessor.
Admiral of the Fleet Sir Rhoderick Robert McGrigor, was a senior Royal Navy officer. He fought in the First World War and saw action during the Gallipoli Campaign and then the Battle of Jutland. He also served in the Second World War, taking part in the sinking of the Bismarck in May 1941, carrying out the office of Assistant Chief of the Naval Staff (Weapons) and commanding the 1st Cruiser Squadron during operations off the Norwegian coast and convoys to North Russia. Furthermore, he served as First Sea Lord in the early 1950s and is most remembered as a leading proponent of carrier-based air power.
Admiral Sir John David Luce, was a Royal Navy officer. He fought in the Second World War as a submarine commander before taking part in the Dieppe Raid and becoming Chief Staff Officer to the Naval Forces for the Normandy landings. He also commanded a cruiser during the Korean War. He served as First Sea Lord and Chief of the Naval Staff in the mid-1960s and in that role resigned from the Royal Navy along with Navy Minister Christopher Mayhew in March 1966 in protest over the decision by the Labour Secretary of State for Defence, Denis Healey, to cancel the CVA-01 aircraft carrier programme.
Admiral Sir Mark Stanhope, is a retired Royal Navy officer. After serving as a submarine commander, he commanded a frigate and then commanded an aircraft carrier on operational patrol off Sierra Leone. He went on to be Deputy Supreme Allied Commander Transformation and then Commander-in-Chief Fleet. He served as First Sea Lord and Chief of the Naval staff, the professional head of the Royal Navy, from July 2009 to April 2013. In this role he advised the British Government on the deployment of naval forces during operations around Libya. He was succeeded by Admiral Sir George Zambellas in April 2013.
Admiral Sir George Michael Zambellas, is a Welsh retired Royal Navy officer. He was the First Sea Lord and Chief of the Naval Staff from April 2013 until he handed over duties to Admiral Sir Philip Jones in April 2016.
Vice-Admiral Thomas Erskine Wardle, was a senior officer in the Royal Navy. He was the Rear-Admiral Commanding His Majesty's Australian Fleet from 30 April 1924 to 30 April 1926.
Admiral Sir James Henry Fuller Eberle, was a senior officer in the Royal Navy who served as Commander-in-Chief Fleet from 1979 until 1981.
Admiral Sir Leslie Derek Empson, was a senior officer in the Royal Navy who served as Commander-in-Chief Naval Home Command from 1974 to 1975.
Vice Admiral Sir David George Steel, is a retired senior Royal Navy officer who served as Second Sea Lord between 2012 and 2015. He assumed the office of Governor of Gibraltar on 11 June 2020.
Admiral Sir Philip Andrew Jones, is a retired senior Royal Navy officer. After service in the South Atlantic in 1982 during the Falklands War, he commanded the frigates HMS Beaver and HMS Coventry. He went on to be Flag Officer, Scotland, Northern England and Northern Ireland, Commander United Kingdom Maritime Forces and Assistant Chief of the Naval Staff before being appointed Fleet Commander and Deputy Chief of the Naval Staff. Jones served as First Sea Lord from April 2016 to June 2019.
Rear Admiral James Anthony Morse,, is a retired senior Royal Navy officer who served as Assistant Chief of Naval Staff (Capability) and Controller of the Navy.
Rear Admiral Matthew John Parr, is a retired Royal Navy officer who has served as Commander Operations and Rear Admiral, Submarines and is currently an Inspector of Constabulary and Fire & Rescue Services.
Rear Admiral John Stuart Weale, is a former Royal Navy officer who served as Flag Officer Scotland and Northern Ireland, Assistant Chief of Naval Staff Submarines and Rear Admiral Submarines.
Admiral Sir Keith Edward Blount, is a senior Royal Navy officer and pilot, who since July 2023 serves as NATO's Deputy Supreme Allied Commander Europe. He was Assistant Chief of Naval Staff and head of the Fleet Air Arm from 2015 to 2019. He served as Commander Allied Maritime Command, NATO, from 2019 to 2023.
Rear Admiral William Jonathan Warrender CBE is a former Royal Navy officer who served as Flag Officer Sea Training.
United Kingdom 
Royal Navy 