Hope Cove was a World War II radar station. In the early 1950s it was revamped as part of the RAF’s Rotor air defence scheme. It was one of five stations equipped with a type R6 (semi-sunk) bunker. The others were Hack Green, Langtoft, St. Twynells and Treleaver.
In the late 1950s the site was taken over by the Home Office and the R6 bunker was turned into a Regional Seat of Government (RSG). Later it became in turn a Sub-Regional Control (SRC), Sub-Regional Headquarters (SRHQ) and Regional Government Headquarters (RGHQ) under various Home Office schemes.