BN114 fitted with 500lb GP bombs while undergoing clearance tests at the Aeroplane and Armament Experimental Establishment. BN114 subsequently served with Nos. 87 and 174 Squadrons , with No. 1472 (Anti-Aircraft Co-operation) Flight and finally with No. 1449 (Fighter) Flight in defence of the Scilly Isles. Photo from: Imperial War Museums

The Folland 43/37 was a dedicated engine testbed aircraft. It was a large plane with a cabin for two observers, provided with engine instruments. A batch of twelve airframes served at Bristol, Napier and Rolls-Royce from 1940. Here a Bristol Hercules VIII is fitted. Photo from: Air Ministry (UK)

Flying near Tampa. Given date March 1942 and the farthest aircraft, 41-2575, served at MacDill Field from 14 February 1942 until 20 April when it crashed. 41-2540 crashed in Texas in 1943 on a war bond tour, masquerading as Suzy Q although it never saw combat. Photo by: Frank Scherschel / Life

613 (City of Manchester) Squadron was equipped with Tomahawk IIA's from August 1941 until April 1942. This rare image was taken at 613's base at RAF Twinwood Farm, Bedfordshire. From 613 Squadron's archive.