List of British Rail modern traction locomotive classes

This article lists every locomotive allocated a TOPS classification and all modern traction (e.g. diesel, electric, gas turbine, petrol) stock used on the mainline network since 1948 (i.e. British Railways and post-privatisation).

Diesel locomotives

The 1955 diesel locomotive classes are given in brackets where applicable.

A large number of different shunter types were purchased by British Rail and its predecessors, many of which were withdrawn prior to the introduction of TOPS. The tables below attempt to list the different types and the different classifications used to describe them as clearly as possible:

Small shunters: under 300 hp

Shunter classes are listed by 1955 class, which puts TOPS classes in ascending order, and generally puts 1948 and 1962 classes in ascending order. Unclassed shunters are placed at the start of the table; TOPS class 07 has been placed so its 1962 class is in the logical place.

CLASS				1948 Numbers	1957 Numbers	TOPS Numbers	Year(s) built	Quantity built	Engine	Year(s) withdrawn	Notes	Scrapped
TOPS	1948	1955	1962
—	—	—	—	—	11104	–	1950	1	52 hp ("At rail:" 39 hp)	1967	Renumbered 52 in the ER/NER Departmental series in 1953.[1]	1
—	—	—	—	—	13000	–	1934	1	250 hp	1949	ex-LMS diesel shunter 7058; BR number never applied[2]	1
—	DY1	D1/1	1/15	11500–11502	D2950–D2952	–	1954–55	3	153 bhp	1966–67	[3][4]	All
Class 01	DY2	D1/2	1/12	11503–11506, 81	D2953–D2956, D2956 (ii)	01 001–2[5][3][6]	1956–58	5	153 hp	1966–81		3
—	DY5	D1/3	1/16	11507–11508	D2957–D2958	–	1956	2	165 bhp	1967–68	[3][6]	Both
Class 02	—	D1/4	1/17	—	D2850–D2869	02 001–4[7][8]	1960–61	20	170 hp	1969–75		13
—	DY11	D2/1	2/4A	11700–11707	D2700–D2707	–	1953–56	8	200 bhp	1964–68	[9]	All
Class 03	DJ15	D2/2	2/1	11187–11211	D2000–D2199 D2370–D2399	03004–03199, 03370–03399 (with gaps)	1957–61	230	204 hp	1968–93 2008	[5][10]	174
Class 04	DJ12/1	D2/4	2/13	11100–11115	D2200–D2214	N/A	(D2341 1948) 1952–62	142	204 hp	1967–72	[5][11] D2341 ordered by LNER but transferred to Southern Region. Four exported to Italy following withdrawal.	124 (1 in preservation)
	DJ12/2	D2/13		11121–11229	D2215–D2341	N/A
—	DJ14	D2/5	2/12A	11177–11186	D2400–D2409	–	1956–57	10	204 bhp	1967–69	[12]	All
—	—	D2/7	2/14	11116–20, 11144–48	D2500–D2509	–	1955–56	10	204 bhp	1967	[13]
Class 05	DJ13	D2/8	2/15A	11136–43, 11161–76	D2550–D2573	05001[5][14]	1955–61	69	204 hp	1966–68, 1983		65
	DJ13/2	D2/9	2/15	—	D2574–D2618	–
Class 06	—	D2/6	2/12	—	D2410–D2444	06001–06010[5][12]	1958–60	35	204 hp	1967–84	06009 as the works pilot at Dunfermline Townhill Wagon Repair Works in July 1975	34
—	DY11	D2/10	2/4	11708–11719	D2708–D2719	–	1957	12	225 bhp	1967	[15][16]	All
			2/4B	—	D2720–D2780	–	1958–61	61	225 bhp	1967–68		59
—	—	D2/11	2/2	—	D2999	–	1958	2	180 bhp	1967	[15]	1
—	—	D2/12	2/14A	—	D2510–D2519	–	1961	10	204 bhp	1967	D2519 employed at NCB until 1984.[17][13]	9
Class 07	—	–	2/16	—	D2985–D2998	07001–07014	1962	14	275 hp	1973–77		7
—	—	D3/1	–	3/4	D2900–D2913	–	1958–59	14	330 bhp	1967	[18][4]	All

• Relation between TOPS, 1948, 1955 and 1962 classes, and 1948, 1957 and TOPS numbers:^[5][19]

Large shunters: 300–799 hp

CLASS				1948 Numbers	1957 Numbers	TOPS Numbers	Built	Quantity	Engine	Withdrawn	Notes	Scrapped
TOPS	1948	1955	1962
				15107	–		1949	1	360 bhp	1958[20]	Ordered by GWR	1
				11001	–		1949	1	500 bhp	1959[21]	Locomotive 1100 Ordered by SR	1
Class 08	DEJ4	D3/2	3/1	13000–13366	D3000–D4192[22] except those listed under classes 09 and 10	08001–08958	1953[23]–62[22]	996	350 bhp	still in use[22]		899 (3 in preservation)
Class 09					D3665–71, D3719–21, D4099–D4114	09001–09026 09101-09107 09201-09205	1959–62[22]	26	350 bhp	still in use[22]	10 rebuilt from Class 08	2
		D3/3	3/1B	13117–13126	D3117–D3126		1955	10	350 bhp	1966–67[24]		All
Class 10	DEJ5	D3/4	3/1C	13137–13151[25]	D3137–D3151, D3439–D3453, D3473–D3502, D3612–D3651, D4049–D4094	N/A	1955–62[25]	146	350 bhp	1967–72[26]	Class 10 (D3452) in BR blue livery at Bodmin General on 28 August 2003	142 (1 in preservation)
	DEJ7	D3/5	3/1D	13152–13166	D3152–D3166		1955	15	350 bhp	1967[24]		All
		D3/6		12000–12002			1935	11	350 bhp	1956–62[27]	ex-LMS diesel shunter	10
		D3/7	3/8	12003–12032			1939–42	30	350 bhp	1966–67[28]	ex-LMS diesel shunter	All
Class 11	DEJ3	D3/8	3/8A	12033–12138		01153	1945–52	136	350 bhp	1967–72[29]	ex-LMS diesel shunter	128 (1 in preservation)
	DEJ1	D3/9	3/10				1944	4	350 bhp	1967[20]	ex-LNER J45 or DES1 Class	All
		D3/10	3/11A				1936	1[19]	350 bhp	1965[21]	Built by GWR
		D3/11	3/11	15101–15106			1948	6	350 bhp	1967[21]	Ordered by GWR
		D3/12	3/9A	15201–15203			1937	3	350 bhp	1964[21]	ex-SR Diesels 1–3
Class 12		D3/13	3/9	15211–15236		N/A	1949–52	24	350 bhp	1968–71[21]	Ordered by SR	23
	DEJ2	D3/14	3/2	15004			1949	1[19]	360 bhp	1962	Ordered by LNER	All
Class 13			7/1		D4500–D4502	13001–13003	1965	3[19]	360 bhp	1983–1985	Rebuilt from Class 08

• Relation between TOPS, 1948, 1955 and 1962 classes, and 1948, 1957 and TOPS numbers:^[5][19]

Type 1 locomotives: 800 – 1,000 hp

CLASS			1957 numbers	TOPS numbers	Introduced	Quantity	Engine	Withdrawn	Notes	Scrapped
TOPS	1955	1962
Class 14 (Teddy Bear)	N/A	6/1	D9500–D9555	N/A	1964–65	56	700 hp	1968–69[30]	5 exported to Belgium (2) and Spain (3).	32
			10800		1950[31]	1[31]	827 hp (rebuilt to 1,400 hp)	1959[31]	Built by LMS in 1946, entered service in 1948, sold Brush Traction, rebuilt into research locomotive Hawk.	1
Class 15	D8/1	8/5	D8200-D8243	N/A	1957–61[19]	44[32]	800 hp	1968–71[21] 1981–1989 (departmental use)		43
Class 16	D8/2	8/4	D8400-D8409	N/A	1958[33]	10	800 hp	1968		All
Class 17 (Clayton Type 1)	N/A	9/18	D8500-D8587	N/A	1962–65	117[34]	2× 450 hp	1968–71[34] 1978 (departmental use)		87
		9/19	D8588-D8616							All
Class 18 (I)	N/A	N/A	N/A		1985 (Proposed)			Never Built		Never Built
Class 18 (II)	N/A	N/A	N/A		2021 (Planned)[35]	15 (Planned)[35]		Under Construction
Class 19	N/A	N/A	N/A	19001	2018	1	DVT	still in use	Built in 1988 as Mark 3 DVT, rebuild as self-powered vehicle in 2018.	0
Class 20	D10/3	10/3[36]	D8000-199, D8300-27[37]	20001–20228	1957–68[37]	228[34]	1,000 hp	still in use[22]		189 (1 in preservation)

• Relation between TOPS, 1948, 1955 and 1962 classes, and 1948, 1957 and TOPS numbers (unless otherwise given):^[5][19]

Type 2 locomotives: 1,001 – 1,499 hp

Locomotive class are listed by TOPS class. 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[33]	58	1,000 hp	1967–68	20 rebuilt to Class 29	All
		D11/2	11/4					1,100 hp
Class 21 (II)	21/5	N/A	N/A	N/A	21544–21547	2004–05	4	2,110 hp	still in use		0
	21/6				21610–21611	2006	2	1,500 hp
	21/9				21901–21910	1991–92	5	1,270 hp
						2010	2
						2016	3
Class 22 (Baby Warship)		D10/2A	10/4A	D6300-D6305	N/A	1959–62[33]	58[38]	1,000 hp	1967–72[38]		All
		D11/5	11/4A	D6306-D6357				1,100 hp
Class 23 (Baby Deltic)		D11/1	11/3	D5900-D5909	N/A	1959[33]	10	1,100 hp	1968–71 1975 (departmental use)
Class 24	24/0	D11/3	11/1	D5000-D5049	24001–24047	1958–61[33]	50	1,160 hp	1967–80 1987 (departmental use)		49
	24/1		11/1A	D5050-5150	24051–24101		101				98
Class 25		D12/1	12/1	D5151–D5299, D7500–D7677	25001–25327	1961[37]-67	323	1,250 hp	1984–87[39][40]		303
Class 26	26/0	D11/4	11/6	D5300-D5319[37]	26001–26046	1958[41]	20[41]	1,160 hp	1975–94[41]		13
	26/1	N/A[19]	11/6A	D5320-D5346[37]		1958[41]	27[41]				21
Class 27		D12/3	12/6	D5347-D5415[37]	27001–27066	1961–62[19]	69	1,250 hp	1987		61
Class 28		D12/1	12/5	D5700-D5719	N/A	1958–59[33]	20	1,200 hp	1967–68[42] 1980 (departmental use)	A 'Metrovick' passing through Grange-over-Sands, June 1963	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[19]	20	1,350 hp	1969–71	Rebuilt from Class 21	All
Classes 30 & 31		D13/1, D14/2	14/2	D5500-D5699, D5800-D5862	31001–31970	1957[33]-62[37]	263 plus 81 conversions	1,250 bhp or 1,365 bhp	1975-2017[22]		217 (10 in preservation)

• Relation between TOPS, 1948, 1955 and 1962 classes, and 1948, 1957 and TOPS numbers (unless otherwise given):^[5][19]

Type 3 locomotives: 1,500–1,999 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[19][37]	33001–33065 33101–33119	1960–62[43]	98[43]	1,550 hp	still in use (with West Coast Railway Company)[22]		59
	D15/2	15/6A	D6586-D6597[19][37]	33201–33212						8
Class 35 (Hymek[44])	D17/2	17/7	D7000–D7100[5]	N/A	1961–64[45]	101[45]	1,700 hp	1971–1975[46]		97
Class 37	D17/1	17/3	D6600-D6608 D6700-D6999[37]	37001–37308	1960–65[47]	309[47]	1,750 hp	still in use[22]		177
Class 38					1980s (Proposed)			Never built		Never built
	D16/1	16/8	10000-10001[19]		1947–48[48]	2[48]	1,600 hp	1963 1966[48]	10000 was built under LMS before nationalisation.	All
	D16/2	16/9	10201-10203[19]		1950 (2) 1954 (1)[33]	3[33]	10201/2: 1,750 hp (1,600 hp from 1957) 10203: 2,000 hp	1963	10203 at Bletchley Ordered by SR before nationalisation.

• Relation between TOPS, 1955 and 1962 classes, and pre-TOPS and TOPS numbers (unless otherwise given):^[5][19]

Type 4 locomotives: 2,000–2,999 hp

CLASS			1957 numbers	TOPS numbers	Built	Quantity	Engine	Withdrawn	Notes	Scrapped
TOPS	1955[19]	1962[19]
			10100		1951	1	2,000 hp	1958	Nicknamed "The Fell Locomotive", ordered by LMS before nationalisation.	1
Class 40	D20/1	20/3	D200-D399[37]	40001-40199	1958–62[37][37]	200	2,000 hp	1967 (1) 1975–85[49] 1987 (departmental use)		193
Class 41 (I) (Warship[50])	D20/2	20/4	D600-D604[37]	N/A	1958–59[45]	5[45]	2× 1,000 hp	1967[45]	Withdrawn before introduction of TOPS system	All
Class 41 (II)	N/A			41001-41002 43000-43001	1972[5]	2[5]	2,250 hp	1982	Power cars for Prototype HST	1
Class 41 (III)	N/A				1990s (Proposed)			Never Built		Never Built
Class 42 (Warship)	D22/1	22/1	D800-D832, D866-D870[5]	N/A	1958–61[5]	38[45]	2× 1,135 hp	1968–72[45] 1985 (departmental use)		36
Class 43 (I) (Warship)	D22/2	22/2	D833-D865[5]	N/A	1960–62	33	2× 1,100 hp	1969–1971		All
Class 43 (II)	N/A			43002-43198	1975–82[49]	197[49]	1,770 hp	Still in use[22]	Power cars for the InterCity 125 HST sets	6
Class 44 (Peak[51])	D23/1	23/1	D1-D10[5]	44001-41010	1959–60	10	2,300 hp	1976–80		8
Class 45 (Peak[51])	D25/1	25/1	D11-D137[37]	45001-45077 45101-45150	1960–63[37]	127	2,500 hp	1981–89[49]		115
Class 46 (Peak[51])	N/A	25/1A	D138-D193[37]	46001-46056	1961[37]	56	2,500 hp	1977–84 1984–1991 (departmental use)		53
Class 47		27/2	D1100-D1111, D1500-D1999[37]	47 001-47 981	1962–68[37]	512	2,750 hp (later derated to 2,580 hp)	still in use[22]		492
Class 48			D1702-D1706	47114-47118	1965–66[37]	5	2,650 hp	1990–91[22]	Re-engined to Class 47, 1969–1971	4
Class 50		27/3	D400-D449[37]	50001-50050	1967–68[37]	50[37]	2,700 hp	still in use with GB railfreight[52]	Based on the DP2 prototype	32
Class 52 (Western[53])	D27/1	27/1	D1000-D1073[5]	N/A	1961–1964	74	2 x 1,350 hp	1973–77		67
Class 53 Falcon[54]	N/A	N/A	1200	N/A	1961	1	2,880 hp	1975	Prototype locomotive. Not classified until taken into BR stock as No. 1200	1
Class 57	N/A			57001-57012 57301-57316 57601-57605	1965–67 Rebuilt: 1997–2004[22]	33[22]	2,580 hp	still in use[22]	Rebuilt from Class 47	0

Type 5 locomotives: over 3,000 hp

CLASS			1957 numbers	TOPS numbers	Built	Quantity	Engine	Withdrawn	Notes	Scrapped
TOPS	1955[19]	1962[19]
Class 51 (Super Deltic)	N/A				1960s (Proposed)			Never Built		Never Built
Class 55 (Deltic[55])	D33/1	33/1	D9000-D9021	55001–55022	1961–62[23]	22[23]	2× 1,650 hp	1980–82	Based on the DP1 Deltic prototype	16
Class 56	N/A			56001-56135	1976–84[56]	135[56]	3,250 hp	still in use	3 in Hungary[22]	97
Class 58	N/A			58001-58050	1983–87[49]	50[49]	3,300 hp	1999–2002	Some were still in use in France (23) and Spain (13), since scrapped[22]	9
Class 59	N/A			59001-59005 59101-59104 59201-59206	1985–95[57]	15[57]	3,300 hp	still in use[22]		0
Class 60	N/A			60001-60015 60017-60100 60500	1989–93[57]	100[57]	3,100 hp	still in use[22]		1
Class 62	N/A				1990s (Proposed)			Never Built		Never Built
Class 65	N/A
Class 66	N/A			66001-66249 66301-66305 66411-66434 66501-66599 66601-66625 66701-66789 66846-66850 66951-66957	1998–2015[22]	446[22]	3,300 hp	still in use[22]		2
Class 67	N/A			67001-67030	1999–2000[57]	30[57]	3,200 hp	still in use[22]		0
Class 68	N/A			68001-68034	2013–2017[58]	34[59][58]	3,800 hp	still in use[58]
Class 69	N/A			69001-69016	2020 (Planned)	16 (planned)	–	Under construction	Planned conversion of Class 56.[60]
Class 70 (II)	N/A			70001-70020	2009–2011	37	3,300 hp	still in use
				70801-70817	2011–2017

Electric locomotives

TOPS class	Pre-TOPS class	Pre-TOPS numbers	TOPS numbers	Built	Quantity	Power supply	Power	Withdrawn	Notes	Scrapped
	EB1/EF1	26502-26511	N/A	1914–1919	10	1.5 kV DC	1,100 hp	1950–1951 1964	Built by NER (later LNER)	All
	EE1	26600		1922	1	1.5 kV DC	1,800 hp	1950 (never used)	Built by NER
	ES1	26500–26501		1903–1904	2	600 V DC	640 bhp	1964	Built by NER	1
Class 70 (I)	Southern Railway Class CC Electrics	20001-20003		1941 1945 1948	3	660/750 V DC	1,470 hp	1968		All
Class 71	HA	E5000–E5023 later E5001–E5024	71001–71014	1958–60	24	660/750 V DC	2,252 hp	1976–77		13
Classes 72 & 73	JA or JB	E6001–E6049	73001–73006 73101–73142	1962 1965–67	49	660/750 V DC, diesel	1,600 hp (electric), 600 hp (diesel)	still in use		10
Class 74	HB	E6101–E6110	74001–74010	1958–60 Rebuilt 1967–1968	10	660/750 V DC, diesel	2,500 hp (electric), 650 hp (diesel)	1976–1977	Rebuilt from Class 71	All
Class 75				1960s (Proposed)		660/750 V DC, diesel		Never Built		Never built
Class 76	EM1	26000–26055 later E26000–26057	76001–76057	1941 (prototype) 1950–53	58	1.5 kV DC	1,300 hp	1970 (prototype) 1981	Prototype built by LNER	57
Class 77	EM2	27000–27006	N/A	1953–54	7	1.5 kV DC	2,490 hp	1968	Sold to Netherlands as NS 1500 Class	4
Class 80		E1000 E2001 from 1959	N/A	1951 rebuilt 1958	1	25 kV AC	2,500 hp	1968	Rebuilt from prototype main line gas turbine-electric locomotive 18100, stored in 1961.	1
Class 81	AL1	E3001–E3023, E3096–E3097	81001–81022	1959–1964	25	25 kV AC	3,680 hp	1968 (2) 1971 (1) 1983–91		24
Class 82	AL2	E3046–E3055	82001–82008	1960–62	10	25 kV AC	3,300 hp	1969 (1) 1971 (1) 1983 (6) 1987 (2)		9
Class 83	AL3	E3024–E3035, E3098-E3100	83001–83015	1960–62	15	25 kV AC	2,950 hp	1975 (1) 1978 (1) 1983 (10) 1989 (3)	83012 (previously E3035) at Doncaster Works	14
Class 84	AL4	E3036–E3045	84001–84010	1960–61	10	25 kV AC	3,560 hp	1979–80		9
Class 85	AL5	E3056–E3095	85001–85040	1961–64	40	25 kV AC	3,200 hp	1981–92		39
Class 86	AL6	E3101–E3200	86001–86048, 86201–86252	1965–66	100	25 kV AC	3,600, 4,040 or 5,000 hp	2002-2021	Some still in use in Bulgaria (7) and Hungary (9)	65
Class 87		E3201–E3234 (not carried)	87001–87035, 87101	1973–75	36	25 kV AC	4,850 or 5,000 hp	2003–6	87028 at Crewe in 1988 27 still in use in Bulgaria	12
Class 88 (I)				1983–87 (planned)		25 kV AC		Never Constructed		Never built
Class 88 (II)			88001–88010	2015–16	10[61]	25 kV AC, diesel	5,400 hp (electric) 940 hp (diesel)	still in use	88003 at InnoTrans 2016	0
Class 89			89001	1986	1	25 kV AC	5,748 hp	2001	89001 Doncaster Works Prototype locomotive
Class 90			90001–90050	1987–90	50	25 kV AC	5,000 hp	still in use	90001 at Crewe
Class 91			91001–91031 later 91101–91122, 91124–91132	1988–91	31	25 kV AC	6,480 hp	2019-date still in use	91021 at Peterborough in 1992	5
Class 92			92001–92046	1993–96	46	750 V DC, 25 kV AC	5,360 hp (750V), 6,760 hp (25 kV)	still in use		0
Class 93 (I)				1992–95 (planned)	30 (planned)	25 kV AC		Never Constructed	Mock-up of a Class 93 Planned InterCity 250 locomotive; project cancelled in 1992	Never built
Class 93 (II)			93001–93010	2022–2024	10	25 kV AC, battery, diesel	5,400 hp (25 kV), 540 hp (battery), 1,200 hp (diesel)	Under Construction		0
Class 99				2025 (planned)	30 (planned)	25 kV AC, diesel	8,050 hp (electric)	Under Construction		0

Miscellaneous locomotives

Type	Class / number(s)	Information
Channel Tunnel	Class 22 (II)	SNCF Class BB 22200 class dual voltage electric locomotives used for freight duties through the Channel Tunnel by Railfreight Distribution during 1994–95, prior to the availability of the dedicated Class 92 locomotives. Allocated as Class 22 under TOPS.
	Class 9000	Dedicated locomotives used only on Eurotunnel Shuttle services through the Channel Tunnel between Folkestone & Calais. No TOPS classification.
	Class 0001	Diesel-electric locomotives used for rescue purposes on the Channel Tunnel network. Classed as 21/9 under TOPS
	Class 0031	Diesel locomotives used for maintenance purposes by Eurotunnel on the Channel Tunnel network. No TOPS classification
Departmental	Class 97	General departmental locomotives, used for special or engineering duties. Were therefore of many different classes, lumped together for numbering purposes. Forty-seven locomotives allocated Class 97 numbers, including five in subclass 97/6.
	Class 97/6	Class 97/6 (97 651, also known as PWM651) at Pitsford and Brampton station Five diesel shunting locomotives purpose-built for departmental duties on the Western Region in 1953 (number 97650) and 1959 (numbers 97651-654), and originally numbered PWM650-4. Withdrawn 1987–2005.
	Various Pre-TOPS Departmental Locomotives
Steam	Class 98	Class 98 Vale of Rheidol locomotive taking on water Used to cover all steam locomotives used on the mainline in Britain. Had particular usage for the three Vale of Rheidol Railway steam locomotives (and one VoR 0-6-0DH) that remained in BR's ownership after the end of mainline steam traction in August 1968, and numbered 98007–98009, although in practice the locomotives retained their former (GWR) numbers 7–9. Also used for privately owned steam locomotives registered to run on the mainline since 1971, with numbers allocated in the following way: First two digits: 98 (for class 98) Third digit: 0–9 representing the Power Class 0–9 Fourth and fifth digits: The last two digits of the locomotive's original number. If this would duplicate an existing number, then the number is increased by 1
Petrol	15097-15099	Petrol powered locomotives built by Simplex, introduced 1919–1925 by the GER and NBR (later LNER (1 built by LNER)), and subsequently inherited by BR.
Gas turbine	18000	18000 at the ORE Arsenal Test Centre in 1988 Prototype mainline gas turbine locomotive built for BR in 1949 by Brown Boveri. Had been ordered by GWR in 1940, but construction was delayed due to World War II.
	18100	Prototype mainline gas turbine locomotive built for BR in 1951 by Metropolitan-Vickers. Had been ordered by the GWR in the 1940s, but construction was delayed due to World War II.

Class 99

SS Invicta at Newhaven in 1971

When British Rail implemented the TOPS system for managing their operating stock, ships capable of carrying rail vehicles were incorporated into the system as Class 99. In order to circumvent restrictions of the application software, these ships were entered on TOPS as locomotives, 'hauling' the trains which they carried on board. Class 99 has now been allocated to a class of bi-mode locomotives.

Builders' demonstrators

These were locomotives built and owned by private firms, but used by British Railways to test them.

Locomotive	Builder	Year	Fate
D0226 & D0227	English Electric	1956–60	Experimental diesel-electric locomotive D0226 post-preservation at Haworth D0226 preserved D0227 scrapped
D0260 Lion	BRCWC	1962-3	Returned to manufacturer and scrapped in 1964
10800 Hawk See 10800, above	Brush Traction	1962-5	Stripped 1972-6 and used as a stationary generator, scrapped 1976
D0280 Falcon See Class 53, above	Brush Traction	1961-5	Transferred (and later sold in 1970) to BR; withdrawn 1975, scrapped 1976
D9998 See Class D2/11, above	Brush Traction	1958	Scrapped
DHP1	Clayton	1963-5	Scrapped 1967
DP1 Deltic	English Electric	1955–61	DHP1 "Deltic" at National Rail Museum, Shildon, UK in October 2006 Withdrawn 1961, preserved
DP2	English Electric	1962-7	Demonstration locomotive DP2 at Kings Cross in 1963 Destroyed in a collision in 1967, scrapped 1970
GT3 (Gas turbine)	English Electric	1961-2	Returned to VF 1962, turbine removed; scrapped 1966
HS4000 Kestrel	Brush Traction	1967–71	Kestrel outside Derby Works during testing in 1968 Sold to Soviet Railways 1971; withdrawn 1989, scrapped 1993
Janus	Yorkshire Engine Company	1956	Demonstration shunter Janus (2787) at Shelton Sold to Appleby-Frodingham Steel works; scrapped c.1982
Taurus	Yorkshire Engine Company	1961	Stripped 1962, scrapped 1965

Unbuilt locomotives

Main article: List of British Rail unbuilt locomotive classes

A number of TOPS class numbers were allocated to proposed locomotives, both diesel and electric, which for many reasons were not proceeded with.

See also

• List of British Rail classes
• British Rail locomotive and multiple unit numbering and classification
• Steam locomotives of British Railways
• List of British Rail diesel multiple unit classes
• List of British Rail electric multiple unit classes
• List of British Rail departmental multiple unit classes
• British Rail coach type codes