Ade
Alga
Bing
Bittleston
Bowman
Bowman of Luton
Burnac
Cyldon
Empire
Gakken
Hornby
Jensen
Kleinemeier
Latimer (Plane)
Mamod
Marvindustries (Robert Fulton Line)
Mersey
MF Steam
Midwest
Opitec
Peake Engines (Ben Peake)
Philcraft (Phil Gravet)
Rattandeep
REW (including conversions and modifications)
SEL (Signalling Equipment Ltd)
Sussex Steam
VEB Geräte und Pumpenbau, Merbelsrod
Weeden
Welby
Wells
Wilesco
? Unknown
