In 1939 assigned to Flight Refuelling as G-AFRG. This one of the two Harrows positioned to Canada to refuel Short Empire flying boats over the North Atlantic. Aircraft taken over by the Royal Canadian Air Force in 1940 with the serial 794. Photo from: Imperial War Museums

The prototype of the Harrow, an interim heavy bomber, at the HP factory airfield. 100 Harrows equipped five RAF bomber squadrons in the course of 1937, but were replaced by 1940 and subsequently used mostly as transport aircraft. K6933 to G-AFRG in 1939, one of three used in in-flight refuelling trials.