"RAF Transport Command Hastings aircraft were operated with a crew of 5 made up of Pilot (left hand seat), Co-pilot (right hand seat), the Navigator sat to the rear of the pilot and sat behind the navigator, the Signaller (Radio Operator), and behind the Co-pilot sat the Air/Flight Engineer. A further crew member the Air Quarter Master (AQM) when required had a work station which was situated between the forward cabin bulkhead and the Radio/Electronics compartment, this housed a wash basin and a tea making area. Opposite was situated a crew toilet and wardroom."
John - the crew positions are not quite correct. The Navigator sat behind the co-pilot and faced forward and the Flight Engineer sat back to back with the Navigator and faced aft. The Signaler sat behind the pilot facing aft.
A further difference between the Mk 1 and Mk 2 was the start-up engine priming system. Mk1 had a ki-gas pump operated by hand from the engineer's position while the Mk 2 had electric priming operated by a button on the Engineer's panel