Aveling-Barford was a large engineering company making road rollers, motorgraders, front loaders, site dumpers, dump trucks and articulated dump trucks in Grantham, England. In its time, it was an internationally known company.

Marshall, Sons & Co. was a British agricultural machinery manufacturer founded in 1848. The company was based in the Britannia Iron Works, Gainsborough, Lincolnshire. Early production was of steam engines and agricultural machinery. Later production included diesel tractors such as the Field Marshall, Track Marshall and former Leyland wheeled tractors.