The Dumpy level wartime tunnels at Dover Castle, which are located at the far southern end of the castle complex and are beneath the earlier Casemate and contemporary Annexe level tunnels, were constructed during the Second World War (1942-1943) to house the Dover Combined Headquarters. In the early 1960’s the complex was converted to be used ads a Regional Seat of Government and the tunnels continued to be maintained, with intermittent phases of upgrading until the 1980’s. (location accurate to the nearest 1m based on available information)