On the 8 January 1940 an Air Ministry conference was convened to discuss the number and composition of crews on the RAFs new four engined bomber aircraft, the Short Stirling and Handley-Page Halifax. These were far more complex than any then in squadron use and the best possible performance from the engines was required. A systems monitor was needed too for such things as petrol supply cocks, boost regulators and engine coolers. He had to be able to carry out temporary repairs that may be sustained during enemy action and also be trained as an Air Gunner. It was proposed these duties be carried out by a new role of Flight Engineer.