BAC One-Eleven suffered disasters in service, strong passenger demand had been demonstrated for jet propulsion. Several manufacturers raced to release passenger jets, including those aimed at the short-haul market, such as the Sud Aviation Caravelle. In July 1956, British European Airways published a paper calling for a "second generation" jet airliner to operate beside their existing turboprop designs. This led to a variety of designs from the British aerospace industry. Hunting Aircraft started design studies on a jet-powered replacement for the successful Vickers Viscount, developing the 30-seat Hunting 107. Around the same time, Vickers started a similar development of a 140-seat derivative
Airliner submissions they had made during the war for a "100 ton bomber". This evolved into the creation of the Bristol Brabazon. The Type II process was complicated by the proposition of Vickers that a move to the newly developed turboprop power should be made. The specification was, therefore ,split in two, with the conventional piston design going to the eventual de Havilland Dove and Airspeed Ambassador. The revolutionary VC.2 Viceroy, first flown in 1948, was the first turboprop design anywhere. The Type III requirement was developed as the Avro Tudor. The Type IV for the jet-powered aircraft went to de