After the war, the company attempted to produce aircraft for the civil market based on their wartime types. These included aircraft such as a single-winged Camel and the Dove, a derivative of the Pup and the Swallow, but the wide availability of war-surplus aircraft at knock-down prices meant this was never economical. In 1919 the company was renamed as Sopwith Aviation & Engineering Company and the factory was re-organised to produce ABC motorcycles under licence; this included an investment of £100,000 in new machinery. In September 1920 the Kingston factory closed for stocktaking and the company decided to enter voluntary liquidation; the works manager at Kingston announced in a letter to the 1400 employees: