Builders
Associated Electrical Industries
Barclay
Beyer Peacock
Birmingham Railway Carriage & Wagon
British United Traction
Brush
Butterley Company
Cambrian
Charles Roberts
Cowans Sheldon
Cravens
Drewry Car Co
English Electric
Fowler
Gloucester Railway Carriage & Wagon
Hudswell Clarke
Hunslet
Hurst, Nelson
Metro-Cammell
Metropolitan Vickers
North British
Pickering
Pressed Steel
Vulcan Foundry
Walker Bros
Wickham of Ware
Yorkshire Engine Company
