The headquarters is on the grounds of Eastbury Park. In 1938 the Royal Air Force took over the site for the use of RAF Coastal Command which made use of the Eastbury house and also created a network of underground bunkers and operations blocks. The house was used as an Officers' Mess though it was subsequently damaged by fire. In 1953 the Commander-in-Chief, Home Fleet, gained an additional NATO responsibility as Commander-in-Chief, Eastern Atlantic, as part of SACLANT, and the Eastern Atlantic NATO military command structure was established at the Northwood Headquarters. The Commander-in-Chief Home Fleet still flew his flag however in HMS Tyne at Portsmouth. In 1960 the Commander-in-Chief Home Fleet moved to Northwood, in 1963 the Naval unit at Northwood was commissioned as HMS Warrior and in 1966 the NATO Channel Command moved to Northwood from Portsmouth. The RAF completely vacated the site in 1969. In September 1971, when the post of Commander-in-Chief Fleet was established, the Royal Navy took over responsibility for the whole site and in 1978 the Flag Officer Submarines also moved his Headquarters to Northwood. As Headquarters of the Commander-in-Chief Fleet, the site was the controlling Headquarters for Operation Corporate, the Falklands War, in 1982. The Permanent Joint Headquarters was established on site in April 1996. In 2002, following a rationalisation, the Commander-in-Chief Fleet moved the majority of his staff to Portsmouth and handed over the Northwood site to the Chief of Joint Operations. In 2006 major construction works commenced to improve the functionality of the site: the works, which involved the refurbishment or replacement of many of the key buildings, were carried under a Private Finance Initiative contract by Carillion. The Queen visited the site on 6 May 2010 to open the main Permanent Joint Headquarters building, part of a £150 million redevelopment of the site. Joint Forces Command was established on site in April 2012.
Occupants
Joint Forces Command
Strategic Command is a tri-service organisation managing allocated joint capabilities from the three armed services.
Permanent Joint Headquarters
Permanent Joint Headquarters is a tri-service organisation holding Operational Control of British armed forces joint military operation. PJHQ is headed by the Chief of Joint Operations. Single-service operations remain under the operational control of the appropriate front-line command.
Multi National Headquarters
Within the same building as the Permanent Joint Headquarters there is also a Multi National Headquarters for the command of European Union military operations. Personnel to support this structure are seconded from existing NATO and national posts on the site, augmented from elsewhere as required. This Multi National Headquarters is currently staffed by EU personnel commanding Counter Piracy operations. The Operational Headquarters for the EU Naval Force moved from Northwood, UK to Rota, Spain and to Brest, France on 29 March 2019.
Royal Navy
The Commander Operations remains with the current operations staff on the Northwood site. Among Commander Operations' responsibilities are command of Commander Task Force 311 and CTF 345. Reservists from HMS Wildfire, part of the Royal Naval Reserve, who had moved from the Northwood Headquarters site to Brackenhill House on Oxhey Drive South in 1988, moved back into a new building on the Northwood Headquarters site in June 2011.
