Royal Air Force Menwith Hill - 421st Air Base Squadron | Education Video by World of Military

Royal Air Force Menwith Hill is a Royal Air Force station near Harrogate, North Yorkshire, England, which provides communications and intelligence support services to the United Kingdom and the United States.

Area: 605 acres (245 ha)

Built: 1956 – 1959

Garrison: 421st Air Base Squadron

In use: 1959–present

Menwith Hill Station was opened on 545 acres (2.21 km2) of land acquired by the British War Office in 1954 and leased to the United States. The United States Army Security Agency established a high frequency radio monitoring capability, monitoring communications emanating from the Soviet Union, operating from 1958.