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
No. 56 Squadron RAF No. 56 Squadron RAF Number 56 Squadron, nicknamed 'the Firebirds' for their ability to always reappear intact regardless of the odds, is one of the oldest and most successful squadrons of the Royal Air Force, with battle honours from many of the significant air campaigns of both World War I and World War II. During the First World War, the Squadron had many aces amongst its ranks such as James McCudden, Albert Ball, Reginald Hoidge and Arthur Rhys-Davids, developing a fierce reputation for the unit. In the Second World War, they fought in the Battle of Britain, and operated as