Operational instruments of the Royal Observer Corps
The Royal Observer Corps (ROC) was a civil defence organisation operating in the United Kingdom between October 1925 and 31 December 1995, when the Corps' civilian volunteers were stood down. (ROC headquarters staff at RAF Bentley Priory stood down on 31 March 1996). Composed mainly of civilian spare-time volunteers, ROC personnel wore a Royal Air Force (RAF) style uniform and latterly came under the administrative control of RAF Strike Command and the operational control of the Home Office. Civilian volunteers were trained and administered by a small cadre of professional full-time officers under the command of the Commandant Royal Observer Corps; a serving RAF Air Commodore.
Royal Observer Corps
During the 1930s the number of groups increased until by 1936, England had a full coverage of observation posts south-east of a line between Flamborough Head in Yorkshire and Poole Harbour in Dorset. (In 1936 the Headquarters of the Observer Corps relocated from RAF Uxbridge to RAF Bentley Priory in north-west London). By 1939 a system of observation posts covered practically the whole of Great Britain, with the western parts of Wales and Scotland together with England's West Country incorporated during 1940. The final group, Portree in the Western Isles, formed in 1941.