Thorpe Camp was disbanded on 1 April 1920 after being renumbered, becoming No. 60 Squadron. The squadron was reformed on 16 September 1935 at RAF Catfoss, and later became one of the Pathfinder squadrons in April 1943. Commonly known as the Dambusters, No. 617 Squadron was the squadron that took part in Operation Chastise in May 1943, destroying Nazi factories, mines, and hydro-electric power stations. 617 Squadron was based at RAF Scampton, but often made use of RAF Woodhall Spa during exercises and missions. No. 619 Squadron was a Heavy bomber squadron, initially formed at RAF Woodhall Spa on the 18th April
No. 11 Group RAF RAF Fighter Command group to be formed, with responsibility for the air-defence of southern England, including London. No.11 Group was organised using the Dowding System of fighter control. Group Headquarters was at Hillingdon House, located at RAF Uxbridge in the London Borough of Hillingdon. The Group operations room was underground in what is now known as the Battle of Britain Bunker. Commands were passed to the sector airfields, each of which was in charge of several airfields and fighter squadrons. The sector airfields were: Sector A: Sector B: Sector C: Sector D: Sector E: Sector F: Sector Y: Sector Z: