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.
Atlantic Fleet (United Kingdom)
The Atlantic Fleet was again formed after the end of World War I, when British naval forces were reorganised to reflect the changed economic and political situation in Europe. The fleet was created upon the disbandment of the Grand Fleet in April 1919, absorbing many, but not all of its elements. It was placed under a Commander-in-Chief, who for part of that year held the title of Commander-in-Chief Atlantic and Home Fleets, before the Home Fleet became the Reserve Fleet and a totally separate command. became the Fleet's flagship and served in that capacity until 1924.