Low Level Bombsight, Mark III use in October 1942. Coastal Command had priority on deliveries and only small numbers reached Bomber Command. The first examples arrived in May 1943 and were fit to Douglas Boston bombers of 2 Group. In 1944 the sight was trialled on the Avro Lancasters of No. 617 Squadron RAF, the Dambusters, who carried out a single low-level attack with them in late 1944. Most examples sent to Bomber Command equipped a small number of De Havilland Mosquito aircraft in No. 627 Squadron RAF (who normally operated as pathfinders) and No. 8 Group RAF (Pathfinder Force). The sight remained with Coastal
RAF Yatesbury Yatesbury village. There were two airfields, East Camp and West Camp, each with buildings and hangars; two target areas were marked out. Training continued until 1919, then squadrons were sent to Yatesbury to be disbanded. The station closed in 1920 and returned to farmland. Part of the west site was operated from 1936 by the Bristol Aeroplane Company as a civilian flying school (No. 10 Elementary Reserve & Flying Training School) where trainees were prepared for service in the RAF or the Reserve, using Tiger Moth aircraft. Guy Gibson, leader of the famous "Dambusters" raid (Operation Chastise) of 1943, took