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 Benevolent Fund as the "Royal Air Force Memorial Fund" as one of their charitable objects was to raise a memorial to airmen who died in the First World War. The Royal Air Force Memorial was completed in 1923. The monument, in Portland stone surmounted by a gilded eagle, can be seen on Victoria Embankment. Fundraising for the RAF Benevolent Fund occurred outside the UK as well. Prior to the United States entering World War II, Piper Aircraft Company produced 49, one for each state in the US plus another, Piper J-3 aircraft with RAF insignia and nicknamed the Flitfire, to be auctioned