Which car manufacturer, founded by Leslie Hayward Hounsfield in London, showed its first production vehicle in 1922?

Trojan was a British automobile manufacturer producing light cars between 1914 and 1965, and light commercial vehicles for a short time.

The company was founded by Leslie Hayward Hounsfield (1877–1957) who went into business as a general engineer in a small workshop called the Polygon Engineering Works in Clapham, South London. He got the idea to make a simple, economical car that would be easy to drive and started design work in 1910. In 1913 the prototype was ready.

War broke out before production could start, from 1914 to 1918, Trojan Ltd, as the company had become in 1914, made production tools and gauges. In 1920 the first series of six cars was made from a works in Croydon and the final production version was shown at the 1922 London Motor Show. An agreement was reached with Leyland Motors to produce the cars at their Kingston upon Thames factory, where work on reconditioning former Royal Air Force wartime trucks was running down. This arrangement continued until 1928, when Leyland wanted factory space for truck production. During the nearly seven years of the agreement 11,000 cars and 6700 vans were made.