Clayton Equipment Company Ltd, now known simply as Clayton Equipment Ltd or CEC and CEL, is a locomotive construction company that specialises in rail equipment, design and build, tunnelling, mining, metro, mainline and shunter locomotives.
- Alexander Chaplin
 - Andrew Barclay
 - Aveling and Porter
 - Avonside
 - Bagnall
 - Beyer Peacock
 - Black Hawthorn
 - Brush
 - Coalbrookdale
 - Cockerill
 - E Borrows
 - E.B. Wilson
 - Fletcher Jennings
 - Fox Walker
 - Gibb and Hogg
 - Grant Ritchie
 - Hawthorn
 - Haydock
 - Head Wrightson
 - Hudswell Clarke
 - Hunslet
 - Kerr Stuart
 - Kitson
 - Manning Wardle
 - Markham
 - Nasmyth Wilson
 - Neilson
 - North British
 - Peckett
 - Robert Heath
 - Robert Stephenson (and Hawthorn)
 - Sentinel
 - Sharp Stewart
 - South Durham
 - Stephen Lewin
 - Vulcan Foundry
 - Wigan Coal
 - Yorkshire Engine Company
 
- Crane Tanks
 - Fireless Locos
 
- AEC
 - ALCO
 - Andrew Barclay
 - Armstrong Whitworth
 - Bagnall
 - Baguley Ltd
 - British Thomson Houston
 - Brush
 - Clayton
 - Cockerill
 - Consett
 - Dietrich
 - Drewry
 - English Electric
 - Express Service
 - FC Hibberd and Co Ltd
 - Fowler
 - Gaston Moyse
 - GEC Traction
 - General Motors
 - Hawthorn Leslie
 - Howard
 - Hudswell Clarke
 - Hunslet
 - ICI
 - Jung
 - Kent Construction
 - Kerr Stuart
 - Lake and Elliot
 - MaK
 - Mercury
 - Motor Rail Ltd
 - Noord
 - North British
 - Orenstein und Koppel
 - Peckett
 - RFS Engineering
 - Robert Stephenson and Hawthorn
 - Rolls Royce
 - Ruston Hornsby
 - Schoma
 - Sentinel
 - SVI
 - Thomas Hill
 - Tractive Power
 - Vollert
 - Vulcan Foundry
 - Werkspoor
 - Yorkshire Engine Company
 
- ACI Elevation
 - AEG
 - Baguley Ltd
 - BemoRail
 - British Thomson Houston
 - Brush
 - Clayton
 - CPM
 - English Electric
 - Express Service
 - GEC
 - Greenwood and Batley
 - Harmill
 - Hawthorn Leslie
 - Hunslet
 - Kerr Stuart
 - Niteq
 - Robert Stephenson Hawthorn
 - Schalke
 - Sculfort
 - Siemens
 - Stored Energy Technology
 - Vollert
 - Wickham
 - Windhoff
 - Zephir
 - Zwiehoff
 
| Length | Varies | 
| Width | Varies | 
| Height | Varies | 
| Number | Alt number | Name | Status | Pool | Depot | Note | 
|---|---|---|---|---|---|---|
| 3 | A | CBD40 | ||||
| B4646 | 930 | Fiona | A | CBD90 Bo-Bo BE | ||
| B4649/1 | 931 | A | CBD90 Bo-Bo BE | |||
| B4649/2 | 932 | Betsy | A | CBD90 Bo-Bo BE | ||
| B4659/1 | 1 | A | CBD80 4w-4wBE | |||
| B4659/2 | 2 | A | CBD80 4w-4wBE | |||
| B4662/1 | 933 | A | CBD90 Bo-Bo BE | |||
| B4662/2 | 934 | Abigail | A | CBD90 Bo-Bo BE | ||
| B4666/1 | 935 | A | CBD90 Bo-Bo BE | |||
| B4666/2 | 936 | A | CBD90 Bo-Bo BE | 
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Clayton{2}