
The story of a great engineering feat - the building, at Heathrow, of one of the largest airports in the world.April 1944 Great Western Aerodrome started its transformation from a privately owned small grass airfield to Heathrow. One of the world?s busiest airports. London?s main civil airport replacing Croydon Airport. The airport opened fully for civilian use on 31 May 1946. London Heathrow ...