Title: List of British Rail modern traction locomotive classes - Wikipedia
Headings: List of British Rail modern traction locomotive classes
List of British Rail modern traction locomotive classes
Contents
Diesel locomotives
Small shunters: under 300 hp
Large shunters: 300–799hp
Type 1 locomotives: 800 – 1000 hp
Type 2 locomotives: 1001 – 1499hp
Type 3 locomotives: 1500–1999 hp
Type 4 locomotives: 2000–2999 hp
Type 5 locomotives: over 3000 hp
Electric locomotives
DC electric locomotives
AC electric locomotives
Miscellaneous locomotives
Class 99
Builders' demonstrators
Unbuilt locomotives
See also
Footnotes
References
External links

Content: Locomotives for TOPS classes 24 and 26 have their original sub-classes shown, as each wholly comprised locomotives from a distinct 1962 class. Class 21 (II) has sub-classes shown as these are superficially similar but mechanically different types grouped into a single class. CLASS
1957 numbers
TOPS numbers
Introduced
Quantity
Engine
Withdrawn
Notes
Scrapped
TOPS
1955
1962
Class 21 (I) (NBL)
D10/1
10/4
D6100-D6157
N/A
1958–60
58
1000 hp
1967–68
20 rebuilt to Class 29
All
D11/2
11/4
1100 hp
Class 21 (II)
21/5
N/A
N/A
N/A
21544–21547
2004–05
4
2110 hp
still in use

0
21/6
21610–21611
2006
2
1500 hp
21/9
21901–21910
1991–92
5
1270 hp

2010
2
2016
3
Class 22 (Baby Warship)
D10/2A
10/4A
D6300-D6305
N/A
1959–62
58
1000 hp
1967–72

All
D11/5
11/4A
D6306-D6357
1100 hp
Class 23 (Baby Deltic)
D11/1
11/3
D5900-D5909
N/A
1959
10
1100 hp
1968–71
D5901 survived in departmental use at the Railway Technical Centre until 1975. Class 24
24/0
D11/3
11/1
D5000-D5049
24001–24047
1958–61
50
1160 hp
1967–80
24061 survived in departmental use until 1987
49
24/1
11/1A
D5050-5150
24051–24101
101
98
Class 25
D12/1
12/1
D5151–D5299,
D7500–D7677
25001–25327
1961 -67
323
1250 hp
1984–87

303
Class 26
26/0
D11/4
11/6
D5300-D5319
26001–26046
1958
20
1160 hp
1975–94

13
26/1
N/A
11/6A
D5320-D5346
1958
27
21
Class 27
D12/3
12/6
D5347-D5415
27001–27066
1961–62
69
1250 hp
1987

61
Class 28
D12/1
12/5
D5700-D5719
N/A
1958–59
20
1200 hp
1967–68
D5705 used by the Research Division until 1980. 19
Class 29
N/A
13/4
D6100-03/06-08/12-14/16/19/21/23-24/29-30/32-33/37
N/A
1958–60
Rebuilt 1965–1967
20
1350 hp
1969–71
Rebuilt from Class 21
All
Classes 30 & 31
D13/1, D14/2
14/2
D5500-D5699,
D5800-D5862
31001–31970
1957 -62
263 plus 81
conversions
1,250 bhp or 1,365 bhp
still in use
31128 is still in use. 217 (10 in preservation)
Relation between TOPS, 1948, 1955 and 1962 classes, and 1948, 1957 and TOPS numbers (unless otherwise given): Type 3 locomotives: 1500–1999 hp
CLASS
Pre-TOPS
numbers
TOPS numbers
Introduced
Quantity
Engine
Withdrawn
Notes
Scrapped
TOPS
1955
1962
Classes 33 & 34
D15/1
15/6
D6500–D6585
33001–33065
33101–33119
1960–62
98
1550 hp
still in use (with West Coast Railway Company)

59
D15/2
15/6A
D6586-D6597
33201–33212
8
Class 35
( Hymek)
D17/2
17/7
D7000–D7100
N/A
1961–64
101
1700 hp
1971–1975

97
Class 37
D17/1
17/3
D6600-D6608
D6700-D6999
37001–37308
1960–65
309
1750 hp
still in use

177
Class 38




1980s
(Proposed)


Never built

Never built

D16/1
16/8
10000-10001

1947–48
2
1600 hp
1963
1966
1 built by LMS
All

D16/2
16/9
10201-10203

1950 (2)
1954 (1)
3
10201/2: 1750 hp (1600 hp from 1957)
10203: 2000 hp
1963
Ordered by SR
Relation between TOPS, 1955 and 1962 classes, and pre-TOPS and TOPS numbers (unless otherwise given):