RAF Marham from the Royal Navy's "Queen Elizabeth"-class aircraft carriers. The first aircraft are arrived at Marham on 6 June 2018, when a four F-35Bs of No. 617 (Dambusters) Squadron, supported by three Voyagers and an Atlas, made an eight hour flight across the Atlantic from Marine Corps Air Station Beaufort in South Carolina. The RAF announced on 5 July 2017 that No. 207 Squadron will be the Operational Conversion Unit for the Lightning II. The squadron is expected to stand up at Marham on 1 July 2019. In 2023 the second front-line squadron, No. 809 Naval Air Squadron, will also form
No. 421 (Reconnaissance) Flight RAF No. 421 (Reconnaissance) Flight RAF No. 421 (Reconnaissance) Flight was a specialist RAF fighter flight created on 21 September 1940 to patrol the Channel and provide early warning of the types of incoming Luftwaffe raids from occupied France. It was later expanded to full squadron strength and renumbered as No. 91 Squadron on 11 January 1941. Its role led to its pilots being nicknamed "Jim Crows". In late September 1940, Air Chief Marshal Hugh Dowding was faced with two problems. The first was a change in Luftwaffe tactics. Until then the main daylight striking force had been the German bombers,