Since 1951, aircraft squadron which have operated at the station have included 7 Sqn., 22 Sqn., 203 Sqn. (Sea King OCU, 1996–2008); 220 Sqn (later renamed 201); 228 Sqn. (later renamed 206), both Long Range Reconnaissance Squadrons; No. 42 Squadron RAF (BAe Nimrod) (disbanded 1992), No. 236 Operational Conversion Unit RAF, the Nimrod front-line conversion-to-type unit (1970-1992). In addition, Royal Air Force Regiment squadrons No. 1 Squadron RAF Regiment and 2625 Sqn (Royal Auxiliary Air Force) were present. 2625 Sqn was disbanded on 1 November 2006, whilst 1 Sqn RAF Regt relocated to RAF Honington. The others relocated or closed. In 2005, RAF St Mawgan was one of the bases shortlisted to house the new Joint Combat Aircraft (JCA) in 2013, but in November 2005, it was announced by Minister of State for the Armed Forces Adam Ingram that the operation would be based from Scotland. Helicopter maintenance (HMF) also ceased here in late 2006.