De Havilland Aircraft Co Ltd
Founded in 1920 by Geoffrey de Havilland, who had previously been chief designer at Airco. The company was initially based at Stag Lane Aerodrome in Edgware, later moving to Hatfield, Herts.
The company pioneered the light aeroplane movement, including the Gypsy and Tiger Moths. These aircraft set many avaiation records, including Amy Johnson's solo flight from England to Australia in a Gypsy Moth in 1930.
In 1944, the Engine Division became the De Havilland Engine Co.
De Havilland became a subsidiary of Hawker Siddeley in 1961, and this in turn was incorporated into British Aerospace in 1977.