Hawker Siddeley HS 748 Paper ended most military manned-aircraft development in the UK, and Avro decided to re-enter the civilian market. The Vickers Viscount had the larger end of the short-haul market, and Avro therefore decided to design a smaller regional airliner powered by two Rolls-Royce Dart turboprop engines, intended to replace the many DC-3 Dakotas that were by then reaching the end of their economic lifespan. Original plans were for a 20–30 seat aircraft with a similar configuration to the Fokker F27, but talks with potential customers soon led to a low-wing 40-seat design being chosen for the 748 project. Avro was not
Vickers River Tyne. Armstrongs shipbuilding interests became the "Naval Yard", those of Vickers on the west coast the "Naval Construction Yard". Armstrong Whitworth Aircraft was not absorbed by the new company. In 1928 the Aviation Department became Vickers (Aviation) Ltd and soon after acquired Supermarine, which became the "Supermarine Aviation Works (Vickers) Ltd". In 1938, both companies were re-organised as Vickers-Armstrongs (Aircraft) Ltd, although the former Supermarine and Vickers works continued to brand their products under their former names. 1929 saw the merger of the acquired railway business with those of Cammell Laird to form Metropolitan Cammell Carriage and Wagon (MCCW);