Reid and Sigrist was an English engineering company based at New Malden in Surrey. It later acquired sites at Desford and Braunstone in Leicestershire. Initially it developed and manufactured aircraft instrumentation and pilot selection aids but later diversified into flying training and aircraft design. During World War II the company was part of the Civilian Repair Organisation repairing, rebuilding and converting warplanes at the Desford site. Post-war, it continued to manufacture aviation instruments and guidance systems but also diversified further to produce cameras and optical instruments. In 1954, the company was purchased and taken over by the Decca Record Company.

Desford is a village and civil parish in the Hinckley and Bosworth district of England, 7 miles (11 km) west of the centre of Leicester and around 7 miles north east of Hinckley. Situated on a hill approximately 400 feet above sea level, the parish includes the hamlets of Botcheston and Newtown Unthank and a scattered settlement at Lindridge. The population at the 2021 census had increased to 4,592. Desford is in the Doomsday Book of 1086 but the name itself is older than that meaning Deor's Ford suggesting an Anglo Saxon origin. Another suggestion is that it means 'ford frequented with wild animals'.