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.
Admiralty Mining Establishment
A mining department was originally established at the Admiralty in 1915, in 1919 the name was changed to the "Mine Design Department" (MDD), it was based at HMS Vernon in Portsmouth. In 1946, after being dispersed to various places during the war, in keeping with many technical departments it employed both military and highly skilled, civilian personnel. It was partly located near Portsmouth naval base at West Leigh House, Havant. as the Admiralty Mining Establishment (AME). In 1951, its role changed significantly for it to be merged into a new larger department called the Underwater Counter measures and Weapon Establishment (UCWE), which was itself later merged into the Admiralty Underwater Weapons Establishment in 1959.