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 Feltwell while also containing the Mathies Airman Leadership School for USAF personnel in the UK, as well as being the home of the Army and Air Force Exchange Service's sole furniture store in the country. It also houses the only Middle School for Lakenheath and Mildenhall, which covers most of the station. The airfield was built during the period of expansion of the RAF in the late 1930s and is similar in layout to many of the other RAF airfields of the period (for example RAF Marham, RAF Watton and RAF West Raynham). The airfield was home to a number of