Royal Observer Corps
The Royal Observer Corps (ROC) was a civil defence organisation intended for the visual detection, identification, tracking and reporting of aircraft over Great Britain. It operated in the United Kingdom between 29 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; latterly a serving RAF Air Commodore.
Thiepval Barracks
From 1954 the barracks contained the operational headquarters of No 31 Belfast Group Royal Observer Corps who operated from a protected nuclear bunker on Knox Road within Thiepval Barracks. Converted from a 1940s anti-aircraft operations room (AAOR) the bunker would support over one hundred ROC volunteers and a ten-man United Kingdom Warning and Monitoring Organisation warning team responsible for the famous four-minute warning in the event of a nuclear strike on the UK. The ROC would also detect radioactive fallout from the nuclear bursts and warn the public of approaching fallout. The two organisations were stood down at the end of the Cold War.