RAF Bentley Priory. The window is located by the main door, just inside the corridor leading to the dining room and depicts two observers on duty at an Observer Corps post in central London with contrails overhead. The colourful window was constructed from an original design and drawing by Observer Lieutenant Commander A P Angove FBIM FITD, the Operations Training Officer (Ops Trg) at HQ ROC. The arched window was designed to balance a Royal Air Force stained glass window already located on the other side of the front door. The 10,000-member main field force of the ROC was stood down on 30 September 1991, and the ROC's original 1966 Royal Banner was laid up at St Clement Danes Church in the Strand, London where it remains on display, a new banner having been presented by HM The Queen in July 1991 during a Royal Review of the ROC and garden party at Bentley Priory. The Corps was dismantled following what was described by the Queen at the Royal Review as "the end of the Cold War" and linked to a Government press release that referred to "possible future developments and improvements in automated nuclear explosion and fallout detection from remote sensors". The S Ad O, retitled as Senior ROC Officer (SROCO), Observer Commander N A Greig OBE and his adjutant Observer Lieutenant P Proost remained in post to administer the reduced ROC contingent under a revised RAF structure. Only the Nuclear Reporting Cell (NRC) elements of the Corps remained in service, working alongside major armed forces headquarters and they entered a new and highly-uncertain phase. Reduced to less than 300 members in total over the whole UK, the retained NRCs now found themselves tasked with the daunting challenge of providing a comprehensive Nuclear, Biological and Chemical (NBC) warfare analysis and warning service for the Military Home Commands, on a reserve-manned basis as NBCCs but without the previous flow of data from posts and controls. From 1991 onwards the "Remnant Elements" became a single reserve Directly Administered Unit within RAF Strike Command (RAFSTC). The position of Commandant ROC became a secondary appointment for the Senior Air Staff Officer (SASO) of No. 11 Group RAF at Bentley Priory. All members were required to remove their original ROC Group designations from their RAF uniforms, and to accept moves towards a change in conditions of service in any Transition-To-War (TTW) that would make