No. 617 Squadron RAF No. 617 Squadron RAF Number 617 Squadron is a Royal Air Force aircraft squadron, based at RAF Marham in Norfolk. It is commonly known as the "Dambusters", for its actions during Operation Chastise against German dams during the Second World War. In the early 21st century it operated the Tornado GR4 in the ground attack and reconnaissance role until being disbanded in the spring of 2014. The squadron reformed on 17 April 2018, and was equipped at RAF Marham during summer 2018 with the F-35 Lightning II, becoming the UK's first squadron with this advanced V/STOL type. According to the
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: