TOPS Depot Codes

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This is, as far as is known, a full list of post-1973 codes used to identify train maintenance depots. Depot codes were applied as stickers to rolling stock; a rather work worn example on a class 40 is shown on this image; the observant will note that these form the inspiration for this site's logo.

Some codes changed over the years and some codes were reused, so some depots and codes are listed more than once. Where known, when each code was used is shown, together with whether a depot is still in use (with operator) or has closed. For NLC, TIPLOC and Stanox codes for depots, the reader is referred to this page. CRS codes, where allocated, are shown here. Those shown in small italic text come from an uncertain source and should be treated with caution.

Codes shown in bold red type are believed to be correct, but require confirmation from a separate source to verify.

AB	Aberdeen Ferryhill		Closed
AB	Aberdeen Guild Street		DB Cargo
AC	Whatley (ARC)		Became WH from 1994
AC	Aberdeen Clayhills	XAC	Virgin Trains East Coast
AD	Ashford (Kent)		Hitachi
AF	Ashford Chart Leacon (Kent)	XEV	Bombardier
AF	Ashford Station (Kent)	AFK	Closed
AH	Ashchurch		Ministry of Defence
AH	Asfordby Technical Centre		Alstom
AK	Manchester Ardwick	XRK	Siemens (for Transpennine Express)
AL	Aylesbury		Chiltern Railways. Replaced Marylebone (ME)
AN	Allerton (Liverpool)	XAL	Network Rail
AO	Acton		DB Cargo
AP	Ashford Rail Plant		Balfour Beatty. Should be AZ?
AT	Alstom		Alstom general code
AV	Vasteras Sweden		Bombardier
AV	Avonmouth Bulk Handling Terminal		Freightliner
AW	Ardwick West		Network Rail
AY	Ayr	XAY	DB Cargo
AZ	Ashford (Kent)		Balfour Beatty
AZ	Alizay (France)		Axiom Rail
BA	Barry		Closed
BA	Basford Hall Yard (Crewe)		Freightliner
BB	Beachbrook Farm		EWS
BB	Billingham		SemCorp Utilities
BB	Boulby		Freightliner
BC	Bescot Yard	XBY	DB Cargo
BC	Birkenhead Mollington Street		Closed
BC	Birkenhead North CS		General storage
BC	Birch Coppice		Freightliner
BC	Bicester	BCD	Ministry Of Defence
BC	Beachbrook Farm		Freightliner
BD	Birkenhead North	XDB	Merseyrail. Formerly BN
BE	Barnetby East		Freightliner
BE	Bristol East Depot		DB Cargo
BE	Bedford Midland	BCS	Govia Thameslink Railway
BF	Beechbrook Farm		Closed
BF	Bedford Cauldwell		Govia Thameslink Railway (formerly Southern for First Capital Connect). Class 319s carried BF1 stickers: the "1" may be for "First")
BG	Hull Botanic Gardens Diesel Multiple Unit Depot	XBG	Northern Rail
BG	Billingham
BH	Barrow Hill		Barrow Hill Roundhouse
BI	Brighton Lovers Walk	XBI	Southern
BI	Brighton Lovers Walk	XDV	Southern
BJ	Bristol Marsh Junction	MJO	Closed
BK	Birkenhead Central		Closed by 2003
BK	Bristol Barton Hill	XHL	DB Cargo
BL	Crewe Basford Hall		Freightliner
BL	Blyth Cambois		Closed 17 September 1994
BM	Bournemouth	XBM	South Western Railway
BN	Bounds Green	XGD	Virgin Trains East Coast
BN	Birkenhead North		Became BD from December 1976
BO	Bedford Cauldwell		See BF
BO	Burton-on-Trent		Nemesis Rail
BP	Beattock		Closed. Code only used to December 1976
BP	Blackpool North Carriage Sidings	XNS	Network Rail
BQ	Bury		East Lancashire Railway. Formerly BV
BQ	Bardon Hill Quarry		Freightliner
BR	Bristol Bath Road Traction Maintenance Depot	XAB	Closed 28 August 1995 (regulatory approval 27 October 1998)
BR	Bristol Kingsland Road		Network Rail
BS	Bescot	BST	DB Cargo
BT	Bo'ness		Scottish Railway Preservation Society
BU	Burton-on-Trent	BUR	Closed; reopened by Nemesis Rail
BU	Burngullow		Freightliner
BV	Bury		Became BQ from January 1975
BW	Barry Wagon Repair Depot		Network Rail
BW	Barrow-in-Furness	XBF	Northern Rail
BX	Buxton		Closed 12 October 1997 (replaced by Peak Forest: no code?)
BY	Bletchley	XBQ	London Midland
BZ	St Blazey (Par)	SBL	DB Cargo
CA	Cambridge Coldhams Lane	XCA	Axiom Rail
CA	Carlisle		DB Cargo
CB	Crewe Brook Sidings		DB Cargo
CB	Codnor Park	BUZ	Midland Heritage Trust
CC	Cambridge Coalfield Sidings		Network Rail
CC	Clacton	XCL	Greater Anglia. Formerly CL
CD	Crewe Diesel		DB Cargo. Formerly CE
CD	Cricklewood East		Became CW from December 1973
CE	Crewe International Electric		DB Cargo. Formerly CW
CE	Crewe Diesel		Became CD from December 1973
CF	Cardiff Canton	XPC	Arriva Trains Wales/Pullman Rail
CG	Crewe Gresty Lane		Network Rail
CG	Crewe Gresty Bridge		Direct Rail Services
CG	Croxley Green		Closed
CH	Chester	XCH	Alstom
CJ	Chirk Kronospan		Colas Rail
CJ	Clapham Junction	XCP	South Western Railway
CK	Corkerhill	XCK	Scotrail
CL	Glasgow Cowlairs		Became GC from October 1983
CL	Clacton		Became CC from December 1976
CL	Carlisle Upperby	XUM	Closed
CM	Camden Carriage Sidings	XCM	London Midland
CN	Carnforth		DB Cargo
CN	Chaddesden		Freightliner
CO	Cranmore	CAE	East Somerset Railway
CO	Coquelles (France)		Eurotunnel
CP	Crewe Carriage Sidings	XCR	DB Cargo (Arriva/London & North Western Railway)
CQ	Crewe		Railway Age
CR	Colchester	COC	Greater Anglia
CR	Crewe Gresty Bridge		Direct Rail Services
CS	Carnforth		West Coast Railway Co
CT	Chester Carriage & Wagon Maintenance Depot		Closed 1998
CT	Cleethorpes		Transpennine Express
CU	Carlisle Currock
CU	Coatbridge Freightliner Terminal		Freightliner
CV	Cardiff Canton Sprinter Depot	XCC	"Paper" code only. See CF
CV	Coalville Mantle Lane		Code used from mid-'80s; closed October 1994
CW	Cricklewood East	XCD	East Midlands Trains. Formerly CD
CW	Crewe Electric/Crewe International		Became CE from December 1973
CX	Crofton	XRF	Bombardier. See also XW
CX	Chalmerston		Freightliner
CY	Crewe Coal/South Yard	XCT	Direct Rail Services
CY	Clapham Junction Yard	XCP	General storage
CZ	Barton Under Needwood Carriage Maintenance Depot (Central Rivers)	XUN	Bombardier
DA	Sheffield (Darnall)		Closed 1987, replaced by Sheffield (SM)
DC	Hull Dairycoates		Closed
DD	Doncaster Wood Yard		DB Cargo
DE	Dundee West	DUE	DB Cargo
DF	Derby RTC		Loram
DI	Didcot Railway Centre	DIG	Great Western Society
DL	Doncaster Works		Wabtec/Freightliner Heavy Haul
DL	Dollands Moor		DB Cargo
DM	Dollands Moor		DB Cargo
DM	Dagenham		Freightliner
DM	Dee Marsh
DN	Darlington		Closed
DP	Devonport		Devonport Management
DR	Doncaster Carr		DB Cargo
DT	Dunfermline Townhill		Closed
DT	Didcot Triangle	DIF	DB Cargo
DU	Doncaster Up Decoy LMD		DB Cargo
DV	Dover		Southeastern Trains
DW	Doncaster West Yard	XWV	Network Rail
DY	Derby Etches Park	XEP	East Midlands Trains
EA	Eastleigh Airport Siding		DB Cargo
EA	East Anglia Railway Museum		East Anglia Railway Museum
EC	Edinburgh Craigentinny	XCN	Virgin Trains East Coast/Freightliner
ED	Glasgow Eastfield	XED	Scotrail. Closed 1992, rebuilt 2004
EE	Exeter St Davids Carriage Sidings Fuelling Point		Great Western Railway
EG	Liverpool Edge Hill	XEG	Closed
EH	Eastleigh	XEH	DB Cargo
EI	Edinburgh Craigentinny Carriage Sidings		Virgin Trains East Coast
EJ	Ebbw Junction		Closed
EJ	Leith South
EL	Heywood		East Lancashire Railway
EM	East Ham	XEM	c2c
EN	Euston Downside	XEN	Closed
EP	Edinburgh Portobello		Merged with Craigentinny (EC) early 1990s
ER	Eurre (France)		SNCF
ES	Embsay		Embsay Steam Railway
ES	Earles Sidings		Freightliner
ET	Eastleigh		Freightliner
ET	Coquelles (France)		Eurotunnel
EU	East Usk Junction New Sidings		DB Cargo
EU	Euston Station		DB Cargo
EX	Overseas Sites		n/a
EX	Exeter St Davids Servicing Depot	XXF	Great Western Railway
FA	Fairwater		Freightliner
FB	Ferrybridge		DB Cargo
FD	Freightliner Diesels (general code)		Freightliner
FE	Freightliner Electrics (general code)		Freightliner
FF	Forest (Brussels)		SNCB/NMBS
FH	Frodingham		Closed April 1993, now reopened and used by Grant Rail
FK	Ferme Park		Became FP, date unknown
FN	Felixstowe North Docks		GB Railfreight
FP	Ferme Park	XFD	Virgin Trains East Coast/GB Railfreight. Formerly FK
FP	Finsbury Park		Closed
FR	Fratton	XFR	South Western Railway
FS	Freightliner Shunters (general code)		Freightliner
FT	Frethun (France)		SNCF
FW	Fort William		DB Cargo
FX	Felixstowe		Felixstowe Dock & Railway Co
FY	Merehead (Foster Yeoman)		Became MD from 1994
FZ	Fort William Yard		DB Cargo
GB	Guide Bridge		Freightliner
GC	Glasgow Cowlairs		Closed. Formerly CL
GD	Gateshead	XGT	Closed
GF	South Gosforth		Nexus
GI	Gillingham (Kent)	XGI	Southeastern Trains
GL	Gloucester	GLP	Cotswold Rail
GM	Grangemouth		Direct Rail Services
GN	Garston Freightliner Terminal		Freightliner
GO	Waterston (Gulf Oil)	WAG	Closed
GO	Goole		Closed
GP	Grove Park		South Eastern Trains
GS	Glasgow Shields		Became GW from March 1975
GS	Glasgow Salkeld Street		Closed
GS	Gloucester Station	GCR	General storage
GU	Guide Bridge		Closed
GW	Glasgow Shields	XGW	Scotrail. Formerly GS
GY	Garston Yard
HA	Haymarket (Edinburgh)	XHA	Scotrail
HB	East Coast Headquarters		n/a
HB	Horbury		Marcroft Engineering
HC	Hornsey Up Carriage Siding (London)	HRU	DB Cargo
HC	Holyhead Carriage Sidings		Arriva Trains Wales
HD	Holyhead		Arriva Trains Wales
HE	Hornsey	XHE	Govia Thameslink Railway
HF	Hereford		DB Cargo
HG	Hither Green		DB Cargo
HH	Haworth		Keighley & Worth Valley Railway
HH	Hams Hall		GB Railfreight
HI	Hitchin Down Yard		Balfour Beatty
	Hitchin Engineers Yard	XHY
	Hitchin Plant Civil Engineer's Sidings
	Hitchin Signal & Telecommunications Engineer's Sidings
HI	Forest (Brussels) (dummy)		See FF
HJ	Hoo Junction		DB Cargo. See also HN
HM	Healey Mills		DB Cargo
HN	Hamilton		Closed
HN	Hoo Junction		DB Cargo. See also HJ
HO	Leeds Holbeck		Network Rail
HO	North Pole International (London) (dummy)		See NP
HP	Hope Blue Circle		Freightliner
HQ	BRB Headquarters		"Paper" allocation only
HR	Hall Road	XHR	Closed 31 May 1997, now reopened and used by Network Rail
HS	Bradford Hammerton Street		Closed
HS	Hoo Junction Fuel Point		DB Cargo
HT	Heaton	XHT	Northern Rail
HU	Hunterston High Level		DB Cargo
HV	Hunterston High Level		Freightliner
HY	Oxford Hinksey Yard		Network Rail
HY	Hyndland		Closed
HZ	Heysham		Lancaster Carriage & Wagon
HZ	Le Landy (Paris) (dummy)		See LY
IG	Isle of Grain		Freightliner
IL	Ilford	XIF	Greater Anglia
IM	Immingham		DB Cargo
IN	UK Industrial Sites		n/a
IN	Immingham Traction Maintenance Depot		Freightliner
IO	Immingham Reception		Freightliner
IP	Ipswich	XIP	Freightliner
IS	Inverness	XIV	Scotrail
KC	Carlisle Currock Wagon Repair Depot		DB Cargo
KD	Carlisle Kingmoor		Direct Rail Services. Formerly KM
KD	Carlisle New Yard		Became KM from January 1975
KG	Knottingley		Freightliner
KK	Kirkdale	XKK	Merseyrail
KM	Carlisle Kingmoor		Became KD from January 1975
KM	Carlisle Kingmoor		Direct Rail Services. Replaced Sellafield (SD)
KM	Carlisle New Yard	XKY	Closed by 1987. Formerly KD
KN	Kineton
KR	Kidderminster		Severn Valley Railway
KT	Kineton		Ministry Of Defence
KX	King's Cross York Way		Closed 1980
KY	Knottingley		DB Cargo
KZ	Killoch Colliery		Freightliner
LA	Laira	XLZ	Great Western Railway
LB	Loughborough		Brush Traction
LC	Longsight Eurostar (Manchester)	XLI	Alstom
LD	Leeds Midland Road		Freightliner. Same as Balm Road?
LE	Landore	XDL	Great Western Railway
LF	Leeds, Midland Road Wheel Lathe		Freightliner
LG	Longsight Electric		Northern Rail
LH	Lostock Hall		Closed
LJ	Llandudno Junction		Closed
LK	Lackenby South Bank		Corus
LL	Liverpool (Downhills)	XDG	Alstom (Depot also referred to as "Edge Hill" or "Alstom Liverpool Traincare Centre")
LL	Liverpool (Downhills)	XEG
LL	Llangollen		Llangollen Railway
LM	Long Marston	LMT	General storage site since 1999, now operated by Motorail Logistics
LN	Lincoln	XTT	Closed
LO	Longsight Diesel		Northern Rail
LP	Le Landy (Paris)		Became LY from 1994
LR	Leicester	LLP	UK Rail Leasing
LS	Manchester Longsight Wheel Lathe		Alstom
LT	Longtown (Cumbria)		Ministry Of Defence. Unclear if code should be LW
LT	Manchester Longsight Freight Terminal		unknown
LT	Longport		DB Cargo
LV	London Liverpool Street		National Express East Anglia
LW	Lawley Street		Freightliner
LY	Le Landy (Paris)		SNCF. Formerly LP
MA	Longsight Carriage	XML	Alstom
MB	Middlesbrough		Closed
MC	March		Became MR from September 1973
MD	Merehead	MQY	Mendip Rail. Formerly FY
ME	Marylebone	XME	Closed 29 July 1992, replaced by Aylesbury (AL)
ME	Manchester International (former Eurostar)	XLI	Siemens (for Transpennine Express)
ME	Mossend		DB Cargo
MG	Margam	MGL	DB Cargo
MH	Millerhill	MLL	DB Cargo
MI	Motherwell		Direct Rail Services
MK	Markinch	MNC	J Cameron
ML	Motherwell		Network Rail
MM	Fire Service College, Moreton-in-Marsh		Cotswold Rail
MN	Machynlleth	XMC	Arriva Trains Wales
MO	Morris Cowley	MOC	Closed
MO	Muir Of Ord		Temporary depot used 7 February 1989 - 9 May 1990
MQ	Meldon Quarry	MQU	Dartmoor Railway
MR	March		Closed. Formerly MC
MS	Mossend	XMS	DB Cargo
MS	Malaga (Spain)		?
MS	Mountsorrell		unknown
MV	Manchester Victoria	XVS	unknown; unofficial code?
MY	Mossend Yard	MUY	Freightliner
NA	Newton Abbot		Closed
NB	New Brighton Electric Multiple Unit Depot		Merseyrail
NB	New Biggin		GB Railfreight
NC	Norwich Crown Point	XNC	Greater Anglia. Depot opened 27 October 1982, replaced Norwich Thorpe (NR)
ND	Neasden		London Underground
NG	New Cross Gate		Closed by 1997
NG	New Cross Gate		London Overground (later depot)
NH	Newton Heath	XNN	Northern Rail
NJ	Norwood Down Sorting Sidings		?
NL	Neville Hill T&RSMD	XNL	East Midlands Trains
NM	Nottingham Eastcroft	XNT	East Midlands Trains
NN	Northampton Kings Heath		Siemens (for London Midland)
NO	Norwich Thorpe		Became NR from September 1973
NP	North Pole International	XNP	Hitachi. Closed; reopened 2016
NR	Norwich Thorpe		Closed, replaced by Crown Point (NC). Formerly NO
NR	Norwich Crown Point Carriage Sidings		GB Railfreight
NT	Northam	XFS	Siemens (for South Western Railway)
NV	Neville Hill		Freightliner
NW	Northwich		Brunner Mond
NY	Grosmont		North Yorkshire Moors Railway
OC	Old Oak Common Locomotive	XOL	Closed
OD	Old Dalby Test Track		Bombardier
OH	Old Oak Common Electric Multiple Unit Depot	XOE	Siemens (for Heathrow Express)
OK	Okehampton		Dartmoor Railway
OM	Old Oak Common Carriage	XOC	Great Western Railway
ON	Orpington		Southeastern Trains
OO	Old Oak Common HST	XOO	Great Western Railway
OW	Orient Way Cariage Sidings	XTX
OX	Oxford	XOX	Great Western Railway
OY	Oxley	XOY	Alstom
PA	St Pancras Cambridge Street		Closed
PB	Peterborough Locomotive Inspection Point	PIP	DB Cargo
PC	Polmadie Carriage Sidings	XPO	Alstom
PE	Peterborough Crescent (Nene Sidings)		Govia Thameslink Railway
PE	Peak Forest		Freightliner
PF	Peak Forest		DB Cargo
PG	Hull Paragon		Closed?
PG	Peterborough		Electro-Motive Services. Code used from May 2009
PH	Perth	XPH	Scotrail
PI	Pwllheli		Closed (used 1980 only)
PI	North Pole International	XNP	Closed
PM	St Philips Marsh	XPM	Great Western Railway
PN	Preston Station	XPT	Northern Rail
PN	Poznan		Axiom
PO	Polmadie	XPO	Alstom
PP	Polmadie Eurostar		Alstom
PQ	Harwich Parkeston Quay		DB Cargo
PR	Private Preservation Sites		"Paper" allocation only
PR	Matlock		Peak Rail
PR	Preston Bakehouse Sidings		Virgin Trains West Coast
PT	Preston		Closed
PT	Peterborough New England		Former OLE depot used by GB Railfreight since 2001
PY	Shoeburyness (Pigs Bay)		QinetiQ
PY	Pyle Hill		Closed
PZ	Penzance		Great Western Railway
QR	Quainton Road		Buckinghamshire Railway Centre
RB	Ranelagh Bridge		Closed
RB	Rylstone		Tilcon
RD	Reading West Yard		Closed
RE	Ramsgate	XRE	Southeastern Trains. Formerly RM
RG	Reading	XRG	Closed
RG	Reading		Great Western Railway (later depot)
RL	Ropley		Mid Hants Railway
RL	Ripple Lane	RPL	Closed
RM	Ramsgate		Became RE from December 1976
RO	Rotherham Steel Terminal		DB Cargo
RR	Doncaster Roberts Road		GB Railfreight
RR	Radyr		Closed 1987
RS	Doncaster Roberts Road		GB Railfreight
RS	Reddish		Closed
RT	Rotherham Steel Terminal		DB Cargo
RU	Rugby	RCS	Colas
RV	Ravenstruther		Freightliner
RY	Ryde		Island Line
SA	Salisbury	XFU	South Western Railway
SB	Shirebrook		Closed 28 September 1996
SB	Stourbridge Junction		Chiltern Railways
SB	Shrewsbury Coleham		Network Rail
SC	Scunthorpe		DB Cargo
SD	Sellafield		Closed 1999, replaced by Carlisle Kingmoor (KM)
SD	Springburn		Closed
SE	St Leonards	XSM	St Leonards Railway Engineering/GB Railfreight
SF	Stratford	XSR	Closed. Formerly SX
SG	Slade Green	XSG	Southeastern Trains
SH	Southampton		Freightliner
SH	Strawberry Hill		Became ST, date unknown
SH	Southall		West Coast Railway Company. Formerly SZ to 1987
SI	Soho	XSZ	London Midland
SI	Strawberry Hill		See ST, believed noted in error
SJ	Shelton		Network Rail
SJ	Stourbridge Junction (Town Platform)		London Midland
SK	Swanwick	BUZ	Midland Railway Centre
SK	Sunderland South Dock		Closed
SK	Stoke Gifford		Freightliner
SL	Stewarts Lane	XSL	Southern (Gatwick Express)/DB Cargo
SM	Sheffield		Northern Rail. Replaced Sheffield Darnall (DA)
SN	Shoeburyness Carriage Sidings	XXS	c2c
SN	Stranraer		Scotrail
SO	Southampton Maritime		Freightliner
SO	Southall		Became SZ, date unknown
SO	Southport		General storage
SP	Springs Branch Component Recovery & Distribution Centre	XWM	DB Cargo
SQ	Stockport Carriage Maintenance Depot		Northern Rail
SR	Stratford Major Depot/Level 5		Closed 31 March 1991. Also known as "High Meads", "Stratford New Works", and "Stratford Traction Repair Shops"
SR	Shrewsbury Coleham		Network Rail
SS	Salillas/Catalayud (Spain)		RENFE
ST	Southport		Merseyrail
ST	Strawberry Hill	XSX	South Western Railway. East side of depot (west side is VZ). Formerly SH
ST	Severn Tunnel Junction		Closed
SU	Selhurst	XSH	Southern
SV	Wembley Wheel Lathe		Alstom. Although listed as being the wheel lathe, the code presumably also applies to an extended site, as some shunters and class 66s are "allocated" to SV
SV	Wembley	XWY	Chiltern Railways. Code is listed, but may be recorded in error (see also Wembley Wheel Lathe)
SW	Swindon	XSW	Closed 1990s
SX	Stratford Running Depot		Became SF from September 1973
SX	Shrewsbury		Arriva Trains Wales
SY	Saltley	SLP	Closed 24 April 2005
SZ	Southampton Maritime		Freightliner/GB Railfreight
SZ	Southall		Formerly SO, became SH 1987
TB	Three Bridges	XTB	Siemens (from 2015; DB Schenker earlier)
TB	Tilburg (Netherlands)		NS
TD	Temple Mills (Stratford)		DB Cargo
TE	Thornaby	XTE	DB Cargo
TF	Thornton Field Carriage Sidings	XTF	Closed
TF	York Yard South		Freightliner
TG	Teigngrace		Colas Rail
TG	Tonbridge		Closed
TG	Tonbridge Jubilee Sidings	XJU	South Eastern Trains
TH	Thornaby	XTE	Freightliner
TI	Tinsley Yard	XTD	Closed
TI	Temple Mills International		Eurostar (UK)
TJ	Tavistock Junction	TVJ	Colas Rail
TJ	Thornton Junction	XTJ	DB Cargo/Scotrail
TK	Tyne Dock		GB Railfreight
TL	Tilbury		Closed
TL	Tilbury Rail Container Terminal		Freightliner
TM	Tyseley Standard Gauge Steam Trust		Birmingham Railway Museum
TM	Tyseley Light Maintenance Depot	XTS	Birmingham Railway Museum
TN	Taunton		West Somerset Railway
TN	Thornton Junction		DB Cargo
TO	Toton		DB Cargo
TP	Trafford Park (Barton Dock)		DB Cargo/Freightliner
TR	Teesport Freightliner Terminal		Freightliner
TS	Tyseley		London Midland
TT	Toton Training School		DB Cargo
TU	Toton Up Yard	TNB	DB Cargo
TW	Tunbridge Wells West		Closed
TW	Toton Wagon Repair Depot		DB Cargo
TY	Tyne Yard		DB Cargo
TZ	Thoresby Colliery Junction		Freightliner
VI	Victoria		South Eastern Trains
VM	Velim Test Track		Czech Republic test track
VR	Aberystwyth		Arriva Trains Wales
VR	Aberystwyth Vale of Rheidol		Vale of Rheidol Railway
VW	Alstom HG (West Coast)		Alstom
VZ	Strawberry Hill	XSX	Siemens. West side of depot (east side is SH)
WA	Warrington Arpley		DB Cargo
WA	Wishaw		Goodmans
WB	Wembley Carriage Sidings		Alstom
WC	Waterloo and City		London Underground
WD	Wimbledon		South Western Railway. Formerly WM
WE	Wembley	XWF	DB Cargo
WE	Willesden Brent	WBS	DB Cargo
WF	Wansford		Nene Valley Railway
WH	Wath		Closed
WH	Whatley	WHQ	Mendip Rail. Formerly AC
WI	Wilton		SemCorp Utilities
WJ	Watford Junction		Closed
WK	West Kirby		Merseyrail
WK	Workington		Northern Rail
WL	Wellingborough		GB Railfreight
WM	Wimbledon		Became WD from December 1976
WN	Willesden	XWT	London Overground
WO	Wellingborough		Closed
WP	Worksop Wagon Repair Depot		Closed
WQ	DB Cargo Board		n/a
WR	West Ruislip	WRD	London Underground
WS	Worcester	XWR	London Midland
WS	Worksop		DB Cargo
WT	Warrington Arpley		DB Cargo
WT	Westhouses		Closed. Formerly WU
WU	Westhouses		Became WT from January 1975
WU	Wembley Traction Maintenance Depot		Chiltern Railways
WV	Manistry Wharf		Freightliner
WW	Washwood Heath Loco Servicing Road 26		DB Cargo
WY	Wembley Yard		DB Cargo. Possibly recorded in error (see WB, WE and Westbury (WY))
WY	Westbury	XWB	DB Cargo
WZ	Warsaw (Poland)		Freightliner
XW	Crofton Depot	XRF	Bombardier. See also CX
XX	Not Yet Allocated		n/a
YC	York Clifton		Closed
YK	York		DB Cargo
YK	York	XYK	Siemens (for Transpennine Express)
YL	York Leeman Road		Freightliner
YM	York National Railway Museum		Science Museum
YO	Yoker	XYD	Scotrail
YS	York South Sidings	XYS	DB Cargo
ZA	RTC Business Park (Derby)		Rail Vehicle Engineering
ZB	Doncaster Works	DOB	Wabtec
ZC	Crewe Works		Bombardier
ZD	Derby Litchurch Lane Works		Bombardier
ZE	Washwood Heath	WHH	Closed March 2005, reopened and used by Boden Rail, Colas Rail and Hanson Rail
ZE	Derby Loco Works		Closed (demolished 2006)
ZF	Doncaster Works	DCC	Bombardier
ZG	Eastleigh Works	XFB	Closed 31 March 2006, reopened and now used by Arlington Fleet Services
ZH	Springburn Works Glasgow		Knorr-Bremse Rail Systems (UK) Limited
ZI	Ilford Works		Bombardier
ZJ	Immingham		Immingham Railfreight Terminals scrapyard
ZJ	Horwich Works		Closed
ZJ	Stoke On Trent		Turner's. Same site as ZW (Marcroft)
ZK	Shildon Wagon Works		Closed
ZK	Kilmarnock Works		Wabtec
ZL	Dewsbury		Closed 2006 (RMS Locotech moved to Wakefield)
ZL	Swindon Works		Closed
ZL	Cardiff Cathays Works		Closed
ZM	Glasgow		Closed 1999
ZM	Temple Mills Wagon Works		Closed
ZN	Wolverton Works	XGH	Knorr-Bremse Rail Systems (UK) Limited
ZO	Polmadie		Alstom
ZP	Horbury Works (Wakefield)	XHB	Closed
ZQ	BRB Headquarters		n/a
ZR	Rotherham		C F Booth
ZR	York Works	YCW	Network Rail
ZS	Wakefield		RMS Locotech
ZT	Stockton		T J Thomson
ZU	Level 5 Selhurst	SFA	Southern
ZW	Stoke On Trent		Axiom Rail
ZX	Raxstar (S Wales)		Raxstar
ZZ	Various Sites For Scrap		"Paper" allocation only

Two character TOPS depot codes

A (hopefully) comprehensive listing