Flying Officer J B Burnside, the flight engineer on board an Avro Lancaster B Mark III of No. 619 Squadron RAF based at Coningsby, Lincolnshire, checks settings on the control panel from his seat in the cockpit.
Flying Officer R. Stewart, a wireless operator on board an Avro Lancaster B Mark I of No. 57 Squadron RAF based at Scampton, Lincolnshire, speaking to the pilot from his position in front of the Marconi TR transmitter/receiver set.
Avro Lancaster aircraft under construction at the A V Roe & Co Ltd factory at Woodford in Cheshire, Despite constant losses in air battle over Germany, new production meant that the numbers of aircraft available were always increasing.