Subclasses

Class 08

08/0 - Standard Design
08/9 - Cwmmawr Branch Mods. (Cut Down Roof)

Class 09

09/0 - Standard Design
09/1 - Rebuilt Class 08 (110V Electrical Supply)
09/2 - Rebuilt Class 08 (90V Electrical Supply)

Class 20

20/0 - Standard Design
20/3 - DRS Modifications
20/9 - Hunslet Barclay Owned

Class 25

25/0 - Standard Design
25/1 - Series 1 Control
25/2 - Series 2 Control
25/3 - Series 3 Control
25/9 - Special Design

Class 26

26/0 - Standard Design
26/1 - Internal Differences (Very Technical!)

Class 27

27/0 - Standard Design
27/1 - Push Pull Fitted
27/2 - ETH and Push Pull Fitted

Class 31

31/0 - Pilot Locomotives
31/1 - Standard Design
31/4 - ETH Fitted
31/5 - ETH Isolated
31/6 - ETH Control Equipment

Class 33

33/0 - Standard Design
33/1 - Push Pull Fitted
33/2 - Hastings Loading Gauge 37/0 - Standard Design

Class 37

37/0 - Standard Design
37/3 - Unrefurbished (CP7 Bogies Fitted)
37/4 - Refurbished (ETH Fitted)
37/5 - Refurbished
37/6 - Channel Tunnel locos (later DRS)
37/7 - Refurbished (Ballast Weights Fitted)
37/9 - Refurbished (Prototype Mods.)

Class 45

45/0 - Steam Heat Fitted
45/1 - ETH Fitted

Class 47

47/0 - Standard Design
47/3 - Built without train heat
47/4 - ETH Fitted
47/6 - High and Phosphorus Brake Blocks
47/7 - Parcels locomotives
47/8 - Long Range Fuel Tanks
47/9 - Test Locomotives

Class 50

50/0 - Standard Design
50/1 - Freight Dedicated

Class 57

57/0 - Freightliner Locomotives
57/3 - Virgin Locomotives
57/6 - Great Western Locomotives

Class 59

59/0 - First Design (Yeoman)
59/1 - Second Design (ARC)
59/2 - Second Design (EWS)

Class 66

66/0 - EWS Locomotives
66/4 - DRS Locomotives
66/5 - Freightliner Locomotives
66/6 - Modified gear ratios (Freightliner)
66/7 - GB Railfreight locos 73/0 - First Design (BR Built)

Class 73

73/0 - First Design (BR Built)
73/1 - Second Design (EE Built)
73/2 - Gatwick Express Dedicated
73/9 - Sandite Fitted

Class 85

85/0 - Standard Design
85/1 - Freight Dedicated

Class 86

86/0 - Standard Design
86/1 - Rebuilt with Class 87 Bogies
86/2 - Rebuilt with Flexicoil Suspension
86/3 - Fitted with SAB wheels
86/4 - ETH Fitted Parcels
86/5 - Flexicoil Suspension Freight
86/6 - ETH Isolated Freight
86/9 - Network Rail Locos

Class 87

87/0 - Standard Design
87/1 - Thyristor Control Fitted

Class 90

90/0 - Standard Design
90/1 - ETH Isolated
90/2 - Composition brake blocks

Class 97

97/2 - ETHEL
97/4 - Ex-Peaks
97/6 - Permanent Way Shunters
97/7 - Battery Locomotives
97/8 - Shunters

Class 98

98/0 - Steam (VoR line)
98/1 - Diesel (VoR line)