Heyford I K3500 of 99 Sqn. This aircraft crashed following an engine failure at night on May 21, 1937.

Another view of the 99 Squadron Heyford K3500, showing the dustbin turret extended.

A formation of Heyfords of 105 Squadron photographed in July 1935. Nos 10 and 99 Squadrons were the first units to receive the Heyford and 11 squadrons operated the type between 1933 and 1939.

Heyford K3489 spent the early part of its life with the A&AEE and the RAE before transferring to 149 Squadron.

The prototype Heyford, J9130, being demonstrated at Radlett in May 1931.

The Heyford prototype, J9130, pictured at Radlett. It was first flown on June 12, 1930 by Maj Jim Cordes for five minutes. A second flight of ten minutes followed later the same day. The nose gunner has not just hijacked the pilot!

Access to the Rolls-Royce Kestrel engines was easy. The sides of the engine housing folded down enabling the engineers to stand while working on the engines.

Winding the elastic. The starting equipment of the Heyford was removable. On top of each wheel are supports for the shafts of the hand turning gear.

The cockpit of the prototype Heyford, J9130, photographed in May 1931. The second pilot's controls could be detached in a moment when not required, as they are in this picture. The bulkhead door dividing the pilot's cockpit from the forward gunner is open.

Close-up view of the retractable pillar box-type gun turret aft of the wings on Heyford K3489 at Radlett in June 1933.

Another view of the Heyford prototype's cockpit showing this time the copilot's controls in position and the twofold bulkhead door to the forward gunner's position closed. The large trim wheel is seen left of centre of the picture. Note too the folding seats; the higher one is in fact the backrest.

Forward gunner’s view of the pilot, in this case flying Heyford K3500 from Radlett in March 1934.