Boac: The Definitive Newsreel History 1939-1974 DVD –  

BOAC (British Overseas Airways Corporation) was the result of a merger between British Airways Ltd and Imperial Airways Ltd in 1939. During the Second World War the new BOAC operated flying boat services to the British colonies we join test pilot Captain Stone checking out a Short Sunderland Flying Boat in 1946. In 1946 London Airport (Heathrow) was opened and the then BOAC aircraft such as the Lancastrian Liberator Halton and the Avro York were all based on World War Two bombers! Later that year the pressurized cabin American Lockheed Constellation joined the fleet with the Boeing Stratocruiser which could fly non-stop to the USA. Between 1949 and 1950 the first modern British airliner the Handley Page Hermes also entered service.