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.

[4] 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.

[6] 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.

[11] The Operational Headquarters for the EU Naval Force moved from Northwood to Rota, Spain and to Brest, France on 29 March 2019.

[12] Strategic Command (UKStratCom) is a tri-service organisation managing allocated joint capabilities from the three armed services.