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 Finningley operate Vulcan bombers. A year later No. 18 Squadron RAF with ECM Vickers Valiants was also established at Finningley. In 1961, No. 101 Squadron RAF took its Vulcans to RAF Waddington changing places with the Vulcan training organisation, No. 230 Operational Conversion Unit RAF. It was two years from 101 Sqn leaving that in 1961, the Valiant having seen its day, No. 18 Squadron was disbanded. The Vulcan OCU stayed with RAF Finningley from June 1961 until December 1969. In 1970 there was an arson attack on Number 2 Hangar by a serving RAF member. After the hangar was locked