Admiralty
It evolved from *Admiralty Navy War Council, (1909–1912) which in turn became the Admiralty War Staff, (1912–1917) before finally becoming the Admiralty Naval Staff in 1917. It was the former senior command, operational planning, policy and strategy department within the British Admiralty. It was established in 1917 and existed until 1964 when the department of the Admiralty was abolished, and the staff departments function continued within the Navy Department of the Ministry of Defence until 1971 when its functions became part of the new Naval Staff, Navy Department of the Ministry of Defence.
First Lord of the Admiralty
The First Lord of the Admiralty, or formally the Office of the First Lord of the Admiralty, was the political head of the Royal Navy who was the government's senior adviser on all naval affairs and responsible for the direction and control of Admiralty Department as well as general administration of the Naval Service of the United Kingdom, that encompassed the Royal Navy, the Royal Marines and other services. It was one of the earliest known permanent government posts. Apart from being the political head of the Royal Navy the post holder simultaneously held the title of the President of the Board of Commissioners for Exercising the Office of Lord High Admiral (known as the Board of Admiralty). The office of First Lord of the Admiralty existed from 1628 until it was abolished when the Admiralty, Air Ministry, Ministry of Defence and War Office were all merged to form the new Ministry of Defence in 1964.