The aircraft served with A&AEE (Aeroplane & Armament Experimental Establishment) and RAE (Royal Aircraft Establishment) It later served with 1 AAS (No.1 Air Armament School) Finaly converted to air instruction frame 4070M.
Whitley Mk I, K4586 First Prototype
The first two Whitley Prototypes were completed in March 1936
On 17 March 1936, the first prototype Whitley Mk I, K4586, conducted its maiden flight from Baginton Aerodrome, piloted by Armstrong Whitworth Chief Test Pilot Alan Campbell-Orde. K4586 was powered by a pair of 795 hp (593 kW) Armstrong Siddeley Tiger IX 14-cylinder air-cooled aircraft radial engines.
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