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 Constabulary
The Constabulary can trace its history back to 1686 when the Royal Navy needed an organisation to prevent dockyard crime. So the Secretary to the Admiralty - Samuel Pepys, the diarist - formed a force of 'porters, rounders, warders and watchmen' to guard the Naval Yards. Porters identified and escorted visitors, rounders patrolled the yard, warders were responsible for the keys and backed up the porters at the gates, and the part-time watchmen guarded buildings and areas by night.