Admiral Sir Antony David Radakin, KCB, ADC (born 10 November 1965) is a senior Royal Navy officer.

Radakin was previously the First Sea Lord, the professional head of the Naval Service from June 2019 to November 2021.

He was appointed Lord High Constable of England in 2023, and in that role took part in the Coronation of Charles III and Camilla.

[8] He continued his legal career alongside his naval service, and qualified as a barrister and was called to the Bar from the Middle Temple in 1996.

The initiative encompassed increasing the UK's operational advantage in the North Atlantic, developing carrier strike operations using the newly constructed aircraft carriers HMS Queen Elizabeth and HMS Prince of Wales, increasing the Royal Navy's forward presence around the world, reforming the Royal Marines into the Future Commando Force and improving the Navy's use of technology and innovation.

[28] Prime Minister Boris Johnson appointed Radakin instead of the Ministry of Defence's preferred candidate, General Sir Patrick Sanders, due to Radakin's reputation as a reformer and Johnson's anticipation of future naval conflicts in the Mediterranean and Indo-Pacific regions.

[31] Radakin made his first Chief of Defence Staff speech to the Royal United Services Institute in December 2021.

"[5] On 11 February 2022, Radakin met with Valery Gerasimov, the Chief of the General Staff of the Russian Armed Forces.

[37] Later, on 31 March 2022, he said Russian President Vladimir Putin had "already lost" the war in Ukraine due to "catastrophic misjudgments.

"[45] Radakin served as Lord High Constable of England at the coronation of King Charles III and Queen Camilla in 2023.

[47] It was announced in February 2024 that Radakin would stay in post as Chief of the Defence Staff until autumn 2025 after proving to be a key player in helping Ukraine in its fight against Russia.

[48] In July 2024 he criticised "historic underinvestment" in the British Armed Forces leading to "deficiencies in people, equipment, stockpiles, training and technology".