Daimler Company
Docker was the managing director of the Birmingham Small Arms Company (BSA) group of companies from the early 1940s until 1956. He also chaired The Daimler Company Limited and the Anglo-Argentine Tramways Company. He became noted during the 1950s for producing show cars, such as the "Golden Daimler" (1952), "Blue Clover" (1953), "Silver Flash" (1953), and "Stardust" (1954).