functions previously administered by the CRCs at RAF Buchan and RAF Neatishead. In late July 2004 it was announced that RAF Boulmer would close by 2012, with the majority of its functions transferring to RAF Scampton. The first action taken in response to this announcement was for No 1 ACC to move to RAF Kirton in Lindsey, a former RAF Fighter Command airfield in Lincolnshire. This would bring the Air Command and Control elements of the Air Surveillance and Control System (ASACS) (the new CRC at RAF Scampton) geographically closer to the ISTAR elements such as the E3 Sentry AWACS force at RAF Waddington. No 1 ACC's move to Kirton was completed in early 2005. On 10 January 2008 it was announced that a study had been conducted into where to locate the elements of the Air Surveillance and Control System (ASACS). The results concluded that the best option in both financial and operational terms is to retain RAF Boulmer as the ASACS hub and as a result the station would stay open beyond 2012. 'A' Flight was one of the three operational flights of No. 202 Squadron RAF and was based at RAF Boulmer, the Sea King HAR.3 helicopter was used, 'A' Flight provided round-the-clock search and rescue cover for a large area, stretching from Fife in the north to Hartlepool in the south and encompassing the Lake District in the west. On 30 September 2015 'A' Flight of No. 202 Squadron departed RAF Boulmer and the provision of SAR from RAF Boulmer ceased. SAR is now carried out by HM Coastguard through a contract with Bristow Helicopters. The RAF School of Aerospace Battle Management (SABM), formerly the School of Fighter Control (SFC), was located at RAF Boulmer from 1990 to 2019. The school became part of the Defence College of Air and Space Operations on its creation in April 2016. The SABM played a central part in delivering the training required for Weapons Controllers and Identification Officers of the Air Operations Branch and airmen and airwomen of the Air and Space Operations Specialists (Aerospace Systems) Trade Group. The school relocated to RAF Shawbury in Shropshire in August 2019. In 2021, Boulmer's Control and Reporting Centre (CRC) was allocated the No. 19 Squadron number plate. Based units The following notable flying and non-flying units are based at RAF Boulmer. Royal Air Force No. 11 Group (Multi-domain Operations) RAF No.