Royal Air Force and replacement by the F-35, the RAF Lossiemouth-based 15 (Reserve) Squadron (the Tornado Operational Conversion Unit) was disbanded in March 2017. Lightning: On 23 November 2015 it was announced that a total of 138 F-35Bs will be ordered. 617 (The Dambusters) Squadron officially reformed on 18 April 2018 as an RAF Lightning Squadron. The first four aircraft arrived at RAF Marham on 7 June 2018. The Sentry AEW1, based at RAF Waddington, provides airborne early warning to detect incoming enemy aircraft and to co-ordinate the aerial battlefield. The Sentinel R1 (formally known as ASTOR – Airborne STand-Off Radar) provides a
RAF Yatesbury Yatesbury village. There were two airfields, East Camp and West Camp, each with buildings and hangars; two target areas were marked out. Training continued until 1919, then squadrons were sent to Yatesbury to be disbanded. The station closed in 1920 and returned to farmland. Part of the west site was operated from 1936 by the Bristol Aeroplane Company as a civilian flying school (No. 10 Elementary Reserve & Flying Training School) where trainees were prepared for service in the RAF or the Reserve, using Tiger Moth aircraft. Guy Gibson, leader of the famous "Dambusters" raid (Operation Chastise) of 1943, took