Chief of the Defence Staff

The Chief of the Defence Staff (CDS) is the professional head of the British Armed Forces and the most senior uniformed military adviser to the secretary of state for defence and the prime minister of the United Kingdom. The chief of the defence staff is based at the Ministry of Defence and works alongside the Permanent Under-Secretary of State for Defence, the ministry's senior civil servant. The Chief of Defence is the highest ranking officer to currently serve in the armed forces. Constitutionally, the sovereign is the de jure commander-in-chief of the Armed Forces. However, in practice, the Government of the United Kingdom de facto exercises the royal prerogative and provides direction of the Armed Forces through the Ministry of Defence's Defence Council, of which the chief of the defence staff is a member. The current chief of the defence staff is Admiral Sir Tony Radakin, who succeeded General Sir Nick Carter in November 2021. Chiefs of the defence staff are appointed on the recommendation of the secretary of state for defence to the prime minister, before being approved by the monarch. From Wikipedia