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 Staff Corps
The Royal Staff Corps was a corps of the British Army responsible for military engineering which was founded in and disbanded in . At the time, the Royal Engineers and Corps of Royal Sappers and Miners were administered as part of the Board of Ordnance. Relations between the Ordnance and the Commander-in-Chief of the Forces, Prince Frederick, Duke of York, were poor and a major motivation for the Corps' creation was to provide a source of engineering expertise under his direct control. It was generally responsible for short-term military engineering works, with the Royal Engineers and Corps of Royal Sappers and Miners remaining responsible for permanent works, but the boundaries between the functions of the corps were blurred. The Royal Staff Corps answered to the Quartermaster-General instead of to the Board of Ordnance. On its disbandment, most of its personnel transferred to the Royal Engineers and the Corps of Royal Sappers and Miners.