Where are the British Admiralty's headquarters?
Admiralty
Full operational control of the Royal Navy was finally handed over to the Chief of Naval Staff (CNS) by an order in Council, effective October 1917, under which he became responsible for the issuing of orders affecting all war operations directly to the fleet. It also empowered the CNS to issue orders in their own name, as opposed to them previously being issued by the Permanent Secretary of the Admiralty in the name of the Board. In 1964, the Admiralty—along with the War Office and the Air Ministry—were abolished as separate departments of state, and placed under one single new Ministry of Defence. Within the expanded Ministry of Defence are the new Admiralty Board which has a separate Navy Board responsible for the day-to-day running of the Royal Navy, the Army Board and the Air Force Board, each headed by the Secretary of State for Defence.  This structure remained in place until the department was abolished in 1964; the operational control and this system still remains in place with the Royal Navy today. For the organisational structure of the admiralty department and how it developed through the centuries see the following articles below.