leased to the Sopwith Aviation Company, based a mile to the south in Canbury Park Road, Kingston, and the company were able to increase greatly its production of Snipe, Dolphin and Salamander fighter planes as a result. At the end of the war, demand ceased. Sopwith tried to buy the factory outright but the government refused. Sopwith Aviation went into voluntary liquidation and reformed in 1920 as H. G. Hawker Engineering at their original Kingston base. The remaining Ham Factory lease was sold to Leyland Motors, which initially used it to recondition ex-War Department lorries for civilian use. It was then used to produce under licence the Trojan Utility Car between 1922 and 1928. During the 1930s, the factory produced Leyland Cub trucks. World War II shifted production to military vehicles, fire engines, other equipment and munitions. After the war the site produced the chassis for Leyland's trolleybus. In 1948 the site was sold back to Hawker Aircraft Ltd and it became the main base for Kingston's aviation industry. The Hawker Hunter was produced there in large numbers, driven by cold war demand. The profits allowed the site to be redeveloped as Hawker's UK headquarters and the factory gained an imposing frontage by 1958 in a building that closely linked design and production. The Ham factory played an integral part in the development of the Hawker Kestrel and Hawker Harrier planes. Following the nationalisation of the aircraft industry in 1977. British Aerospace continued to build Harriers and missile kits at the site. Following privatisation in 1985, the site's closure was announced in 1991. It was demolished in 1993 and replaced by further housing development. Paint and varnish In 1929 the site on the opposite side of the road to the Leyland factory was developed for the Cellon Doping Company, originally producing Cellon aircraft dope, a synthetic varnish used to waterproof aircraft fabric. The company became part of Pinchin Johnson and was acquired by Courtaulds in 1960, continuing under the International Paint group banner from 1968. The factory closed in the 1980s and the site was redeveloped as a small industrial estate. Today Apart from one plant nursery, local community, retail and small scale offices, Ham today is predominately a commuter residential area dependent on employment outside the immediate area. Landmarks The main feature in Ham is Ham Common which has a cricket pitch, a pond and a woodland. A straight