List of Train Describers

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The following list of train describers was last updated on 23rd October 2022.

Specific information relating to each TD (such as ECSs/SOPs which give the S-Class data mapping, Block schematics which show all the berth steps within a TD and stepping tables which show which conditions must be met in order for description to step) can be found by clicking on the link in the 'ID' column.

User contributed maps, where available, show signal berths and their locations in relation to the railway. Because maps have been compiled using steps seen from the feed, the placement of berths may not be accurate in all locations.

General information relating to entire signalling areas can be found by clicking the link in the 'topic' column. This may include track and signalling maps released by Network Rail.

The column headings are as follows:

  • ID - identity of the train describer in TD messages. This is not necessarily the same as the plated signalbox ID. Where a link is provided you will find specific details relating to that TD area.
  • Name - the name of the train describer
  • Topic - the name of the topic - if unspecified, data is available on the 'all area' feed. Where a link is provided you will find generic details relating to that area.
  • SIG - whether signal aspects (on/off) are available
  • RTE - whether route set indications are available
  • TRS - whether Train Ready To Start (TRTS) indications are available
  • TRK - whether track occupation (track circuit or axle counter) indications are available
  • PTS - whether points (normal/reverse) indications are available
  • LXG - whether level crossing barrier control indications are available
  • Commissioning - the date the train describer was commissioned or when it is expected.

A TD with the name of 'TBD' indicates a train describer which is planned, but details are not yet available. A '?' in one of the six S-Class columns indicates that this detail is not currently known. A Commissioning date marked * refers to the first messages in the feed, and may not relate to live signalling.

Train Describers

Current and Planned

ID Name Topic SIG RTE TRS TRK PTS LXG Commissioning
A2 Ashford IECC B TD_KENT_MCC_SIG_AREA
A3 Ashford Front-End TD TD_KENT_MCC_SIG_AREA
AD Ashford IECC A TD_KENT_MCC_SIG_AREA
AL Alnmouth SB TD TD_LNE_NE_SIG_AREA
AN Allington Junction TD_MC_EM_SIG_AREA
AS Aston SCC TD TD_LNW_WMC_SIG_AREA
AW Acton Wells TD_ANG_SIG_AREA
B1 BAROC Strawberry Hill Scalable 30/03/2021*
B2 BAROC Ascot Scalable 30/03/2022*
BA Barnsley PSB TD TD_LNE_NE_SIG_AREA 11/04/2021* (S-Class enabling)
BE Basingstoke TD_WESS_SIG_AREA
BG WMSC Bromsgrove Corridor WestCAD 07/11/2016
BL Bristol PSB ITD TD_WWC_SIG_AREA
BM Barnham DTD TD_SUSS_SIG_AREA
BN Birmingham New Street PSB TD_LNW_WMC_SIG_AREA Planned decommissioning 2022-12-25
BP Basingstoke (Poole - Wool) TD_WESS_SIG_AREA
BS Barnes TD TD_WESS_SIG_AREA
BU EMCC Burton Area WestCAD 17/08/2018*
BX Basingstoke (WoE) TD_WESS_SIG_AREA
C0 TfW CVLICC TAM Area WestCAD ? ? ? ? ? ? Planned 2023-01-13
C1 SWCC Newport Corridor WestCAD TD_WWM_SIG_AREA
C2 SWCC Cardiff Area MCS TD_WWM_SIG_AREA
C3 SWCC Shrewsbury North WestCAD TD_WWM_SIG_AREA
C5 WROC North Wales Coast WestCAD 09/03/2018*
C6 SWCC Swansea Area WestCAD 26/02/2019*
CA Cambridge ITD TD_ANG_SIG_AREA
CC Colchester TD_ANG_SIG_AREA
CD Castleford TD_LNE_NE_SIG_AREA 04/04/2021* (S-Class enabling)
CE Crewe PSB TD_LNW_C_SIG_AREA
CH Chichester TD_SUSS_SIG_AREA
CL Carlisle PSB TD TD_LNW_LC_SIG_AREA
CS Chester PSB TD_LNW_C_SIG_AREA
CT Channel Tunnel TD_KENT_MCC_SIG_AREA
CV WMSC Cherwell Valley WestCAD TD_LNW_WMC_SIG_AREA 08/08/2016
CY WMSC Coventry WestCAD TD_LNW_WMC_SIG_AREA
D0 TVSC Bristol Temple Meads Area Scalable IECC 29/03/2018*
D1 TVSC Reading IECC A TD_WTV_SIG_AREA
D2 TVSC Reading IECC B TD_WTV_SIG_AREA
D3 TVSC Paddington Area Scalable IECC TD_WTV_SIG_AREA
D4 TVSC Hayes Area Scalable IECC TD_WTV_SIG_AREA
D5 TVSC Didcot IECC TD_WWC_SIG_AREA
D6 TVSC Maidenhead Area Scalable IECC TD_WTV_SIG_AREA
D7 TVSC Swindon Area IECC TD_WWC_SIG_AREA
D9 TVSC Stoke Gifford IECC TD_WTV_SIG_AREA 30/08/2016
DA TVSC Acton Area Scalable IECC 2021-12-21*
DR Doncaster PSB TD TD_LNE_GN_SIG_AREA
DU Dundee TD 29/09/2021*
DY EMCC Derby Area WestCAD TD_MC_EM_SIG_AREA 03/09/2018
E1 Edgeley No 1 TD_LNW_C_SIG_AREA
EA Edinburgh SCC IECC "A" (Scalable) TD_SE_SIG_AREA 2022-11-20*
EB Edinburgh SCC IECC "B" TD_SE_SIG_AREA Planned decommissioning 2023-04-23
EB Edinburgh SCC IECC "B" (Scalable) TD_SE_SIG_AREA Planned 2023-04-23
EC Edinburgh SCC IECC "C" TD_SE_SIG_AREA Planned decommissioning 2023-09 to 2023-10
EC Edinburgh SCC IECC "C" (Scalable) TD_SE_SIG_AREA ? ? ? ? ? ? Planned 2023-09 to 2023-10
ED Edinburgh SCC IECC "D" (Scalable) TD_SE_SIG_AREA
EE Edinburgh SCC IECC "E" 2022-11-20*
EH Eastleigh TD_WESS_SIG_AREA
EK East Kent MCS ITD TD_KENT_MCC_SIG_AREA
EN Cambridge IECC (Ely - Norwich) TD_ANG_SIG_AREA
EX Exeter TD_WWC_SIG_AREA
FE Ferrybridge TD_LNE_GN_SIG_AREA
FH Feltham ASC TD TD_WESS_SIG_AREA Planned decommissioning 2023-08
G1 WSSC Glasgow Area WestCAD TD_SW_SIG_AREA
G2 WSSC Paisley ITD TD_SW_SIG_AREA
G3 WSSC Newton/Whifflet Area WestCAD 18/04/2017
G4 WSSC Motherwell/Carstairs Area WestCAD 16/08/2018*
GD Guildford TD_WESS_SIG_AREA
GL Gloucester ITD TD_WWC_SIG_AREA
HG Harrogate IECC TD_LNE_NE_SIG_AREA
HN Heaton Norris TD_LNW_C_SIG_AREA
HT Havant TD_WESS_SIG_AREA
IH Inverness Highlands WestCAD 05/12/2017*
IR Inverness RETB ? ? ? ? ? ? Planned 2022-08 (provisional) uncertain
KG EMCC Kettering Area WestCAD 21/02/2018*
KM EXROC Mid-Cornwall Workstation ? ? ? ? ? ? Planned 2023-11
KN WMSC Kings Norton WestCAD 07/11/2016
L1 Lincoln West ? ? ? ? ? ? Planned 2023-06-01 to 2023-08-31
L2 Lincoln East TD_MC_EM_SIG_AREA
LA Lancing TD_SUSS_SIG_AREA
LC WMSC Leamington Corridor TD_LNW_WMC_SIG_AREA
LN Lincoln TD_MC_EM_SIG_AREA Planned decommissioning 2023-06-01 to 2023-08-31
LR EMCC Leicester Area WestCAD TD_MC_EM_SIG_AREA
M0 MRROC Lime Street WestCAD 26/07/2018*
M1 MRROC Liverpool Area WestCAD TD_LNW_C_SIG_AREA
M2 MRROC Manchester North WestCAD TD_LNW_C_SIG_AREA
M3 MRROC Manchester Central WestCAD TD_LNW_C_SIG_AREA
M4 MRROC Wavertree (East) WestCAD 07/05/2018*
M5 MRROC Wavertree (West) WestCAD 19/12/2018*
M6 MRROC Macclesfield Area WestCAD 29/08/2022*
M7 MRROC Crewe South Area ? ? ? ? ? ? Planned 2023-08
M8 MRROC Crewe Independent Lines ? ? ? ? ? ? Planned 2023-08
M9 MRROC Blackpool Area WestCAD 29/01/2018
MA Maidstone East TD_KENT_MCC_SIG_AREA
MD EMCC Mansfield TD_MC_EM_SIG_AREA
ME Marylebone Chilterns IECC TD_LNW_WMC_SIG_AREA
MH Machynlleth TD_WWM_SIG_AREA
MO Morpeth SB TD TD_LNE_NE_SIG_AREA
MP Manchester Piccadilly PSB TD TD_LNW_C_SIG_AREA
MS Manchester South TD_LNW_C_SIG_AREA
MZ Manchester East WestCAD TD_LNW_C_SIG_AREA
NE EMCC North Erewash Area WestCAD TD_MC_EM_SIG_AREA
NJ Neasden Jn TD ? ? ? ? ? ? 2016
NK Ashford North Kent MCS TD_KENT_MCC_SIG_AREA
NL Colchester NYL Area MCS 04/02/2020*
NM EMCC Nottingham WestCAD TD_MC_EM_SIG_AREA
NS WMSC New Street Station WestCAD Planned 2022-12-25
NX East London Line TD_SUSS_SIG_AREA ? ? ? ? ? ?
PB Peterborough TD_LNE_GN_SIG_AREA Planned decommissioning 2023-05-27
PH Plymouth TD_WWC_SIG_AREA
PJ WMSC Proof House Jn WestCAD 17/12/2017*
PT Port Talbot TD_WWM_SIG_AREA
PX Preston PSB TD TD_LNW_LC_SIG_AREA
Q0 ROROC Crossrail RCC (Core) 14/02/2019*
Q1 ROROC Stratford IECC 06/11/2016
Q2 ROROC Shenfield IECC 26/02/2017
Q3 ROROC West Anglia Area IECC 08/03/2019*
Q4 ROROC Liverpool Street Area IECC 13/09/2020*[1]
Q5 ROROC LT&S (Main) Area IECC 27/09/2020[1]
Q6 ROROC LT&S (Loop) Area IECC 27/09/2020[1]
R1 Rugby SCC (Watford - Bletchley ITD) TD_WCS_SIG_AREA
R2 Rugby SCC (Northampton - Rugby ITD) TD_WCS_SIG_AREA
R3 RYROC Stafford Area WestCAD 01/09/2015
R4 RYROC Colwich Area WestCAD ? ? ? ? ? ? Planned 2023-07-15
R5 RYROC Claydon Area ? ? ? ? ? ? Planned 2024-07
RA Radyr TD_WWM_SIG_AREA Planned decommissioning 2023-01-13
RT Marston Vale MCS TD_WCS_SIG_AREA
RW Rochdale West TD_LNW_C_SIG_AREA
SC Scunthorpe TD_LNE_GN_SIG_AREA
SJ WMSC Stourbridge WestCAD TD_LNW_WMC_SIG_AREA
SK Stoke On Trent TD_LNW_C_SIG_AREA
SM Stirling Middle TD_SE_SIG_AREA
SO South Tottenham TD_ANG_SIG_AREA
SS Sandhills Area WestCAD TD_LNW_C_SIG_AREA 2022-03-27
SU Surbiton (Woking) TD_WESS_SIG_AREA
SV WMSC Stour Valley WestCAD 17/12/2017*
SX Saxmundham (East Suffolk) MCS TD_ANG_SIG_AREA
T0 TYROC Ashington Workstation ? ? ? ? ? ? Planned 2023-12
T1 TYROC Newcastle/Gateshead Area WestCAD TD_LNE_NE_SIG_AREA 2021-12-25*
T2 TYROC Darlington Area WestCAD TD_LNE_NE_SIG_AREA 2021-12-25*
T3 TYROC Sunderland Area WestCAD 2021-12-25*
TB Three Bridges ASC ITD TD_SUSS_SIG_AREA
TD WMSC Telford TD_LNW_WMC_SIG_AREA
TE Tonbridge TD_KENT_MCC_SIG_AREA
TH Thrumpton TD_LNE_GN_SIG_AREA
TN EMCC Chesterfield Area WestCAD TD_MC_EM_SIG_AREA
TW Tweedmouth SB TD TD_LNE_NE_SIG_AREA
U3 Upminster 3 IECC TD_ANG_SIG_AREA
VC London Victoria TD_SUSS_SIG_AREA
W2 Woking (Farnham) TD_SUSS_SIG_AREA
WA Warrington PSB TD_LNW_C_SIG_AREA
WC Wembley C Sidings 07/06/2015
WD Winsford PSB TD_LNW_C_SIG_AREA
WE Worksop TD_LNE_GN_SIG_AREA
WH West Hampstead PSB TD_MC_EM_SIG_AREA
WI Wimbledon NCP TD_WESS_SIG_AREA
WJ Wembley Mainline (Watford) WestCAD TD_WCS_SIG_AREA
WK Wakefield Kirkgate TD_LNE_NE_SIG_AREA
WL WMSC Walsall WestCAD
WN WMSC Water Orton WestCAD TD_LNW_WMC_SIG_AREA
WO WMSC Wolverhampton WestCAD TD_LNW_WMC_SIG_AREA
WS Willesden Suburban TD_WCS_SIG_AREA
WW Westbury TD_WWC_SIG_AREA
WY Wembley Mainline PSB TD_WCS_SIG_AREA
X0 TBROC Thameslink Core WestCAD TD_SUSS_SIG_AREA 15/03/2015
X1 TBROC London Bridge Central WestCAD TD_SUSS_SIG_AREA 05/01/2015
X2 TBROC Charing Cross WestCAD 04/01/2016
X3 TBROC Cannon Street WestCAD 30/08/2016
X5 TBROC Sutton Area WestCAD 09/03/2018* Planned decommissioning 2022-12-25
X6 TBROC Streatham Area WestCAD 03/05/2016 Planned decommissioning 2022-12-25
X7 TBROC East Sussex MCS 02/12/2019*
X8 TBROC Victoria Kent WestCAD ? ? Planned 2022-12-25

Two WestCAD TD systems over 3 SMART links. To be named TBROC Victoria Kent TD (1 link) & TBROC Victoria Sussex TD (2 links).

TBROC Sutton and Streatham WestCADs (X5 & X6) and significant portions of London Victoria (VC) to be migrated to the TBROC Victoria Sussex TD at the same commissioning.

XA TBROC Victoria Sussex WestCAD (link 1) ? ?
XB TBROC Victoria Sussex WestCAD (link 2) ? ?
XE Warrington Central TD_LNW_C_SIG_AREA
XL Hunts Cross TD_LNW_C_SIG_AREA
Y0 YKROC North Lincs WestCAD 30/12/2015
Y1 YKROC York Area IECC 25/12/2018*
Y2 YKROC Leeds City Area IECC TD_LNE_NE_SIG_AREA 25/12/2018*
Y3 YKROC Leeds North West Area IECC TD_LNE_NE_SIG_AREA 25/12/2018*
Y4 YKROC Sheffield WestCAD 02/05/2016
Y5 YKROC Brough WestCAD 07/11/2018*
Y6 YKROC Huddersfield WestCAD 18/01/2018*
Y7 YKROC Halifax WestCAD 17/10/2018*
Y8 YKROC Kings Cross North WestCAD 26/11/2018*
Y9 YKROC Kings Cross South WestCAD 14/04/2021*
YA YKROC Hartlepool Area WestCAD 07/02/2021
YB YKROC Middlesbrough Area WestCAD 1 2021-11-15*
YC YKROC Peterborough Area WestCAD ? ? ? ? ? ? Planned 2023-05-27
YD YKROC Huntingdon Area WestCAD ? ? ? ? ? ? Planned 2023-05-27
YO Yoker SCC MCS TD_SW_SIG_AREA
Z1 Test TD Dummy TD used for testing, data should be ignored 2022-08-02*
ZA Ashford TDC TD_KENT_MCC_SIG_AREA
ZB Bournemouth TDC TD_WESS_SIG_AREA
ZG Guildford TDC TD_WESS_SIG_AREA
ZH Horsham TDC TD_SUSS_SIG_AREA
ZR Rainham TDC TD_KENT_MCC_SIG_AREA
ZY Yeovil TDC - Salisbury & Exmouth Jn TD_WESS_SIG_AREA ?

Decommissioned

ID Name Topic SIG RTE TRS TRK PTS LXG Abolished
BD Bowesfield TD_LNE_NE_SIG_AREA 09/03/2019
CF Cardiff TD_WWM_SIG_AREA 30/12/2015
CM Carmuirs East TD_SE_SIG_AREA ~26/12/2017
DN (Not commissioned)
DY Derby TD_MC_EM_SIG_AREA 01/09/2018
ES TBROC East Sussex MCS TD_SUSS_SIG_AREA 02/12/2019
F2 Feltham (Shepperton Branch) IECC 02/04/2021 (commissioned 23/06/2019)
HM Healey Mills TD_LNE_NE_SIG_AREA ~22/01/2018
HU Huddersfield TD_LNE_NE_SIG_AREA ~22/01/2018
K2 Kings Cross (Hertford Loop) TD_LNE_GN_SIG_AREA 02/12/2018
KX Kings Cross TD_LNE_GN_SIG_AREA 24/03/2022
LB London Bridge ASC TD TD_KENT_MCC_SIG_AREA 25/07/2020
LE Leamington Spa TD_LNW_WMC_SIG_AREA 07/08/2016
LS Liverpool Street IECC "A" TD_ANG_SIG_AREA 13/09/2020[1]
ML Motherwell PSB TD TD_SW_SIG_AREA 25/12/2019
NT Newport PSB TD_WWM_SIG_AREA 29/10/2012
OX Oxford PSB TD_WWC_SIG_AREA 07/07/2018
SA Saltley TD_LNW_WMC_SIG_AREA 07/11/2016
SD Sheffield TD_LNE_GN_SIG_AREA 02/05/2016
SE Shenfield IECC (Liverpool Street IECC "C") TD_ANG_SIG_AREA 26/02/2017
SH Slough A TD_WTV_SIG_AREA 07/04/2015
SI Stratford IECC (Liverpool Street IECC "B") TD_ANG_SIG_AREA 06/11/2016
SN Swindon A ITD TD_WWC_SIG_AREA 21/02/2016
SS Merseyrail IECC TD_LNW_C_SIG_AREA 2022-03-27
T1 Tyneside 1 IECC TD_LNE_NE_SIG_AREA 2021-12-25
T2 Tyneside 2 IECC TD_LNE_NE_SIG_AREA 2021-12-25
TY Tees Yard (Ryhope) TD_LNE_NE_SIG_AREA 07/02/2021
UR Upminster "A" IECC TD_ANG_SIG_AREA 27/09/2020[1]
U2 Upminster "B" IECC TD_ANG_SIG_AREA 27/09/2020[1]
VT Thameslink South TD_SUSS_SIG_AREA 15/03/2015
WG West Anglia IECC (Liverpool Street IECC "D") TD_ANG_SIG_AREA 09/03/2019
WT Thameslink North TD_MC_EM_SIG_AREA 15/03/2015
XB Macclesfield TD_LNW_C_SIG_AREA 27/08/2022
XH Stafford No 4 TD_LNW_C_SIG_AREA 01/09/2015
XJ Stafford No 5 TD_LNW_C_SIG_AREA 01/09/2015
XP Manchester North ? 07/04/2015
XZ Liverpool Lime Street TD_LNW_C_SIG_AREA 29/07/2018
Y2 York IECC 2 (Leeds City) TD_LNE_NE_SIG_AREA 25/12/2018
Y3 York IECC 3 (Leeds North West) TD_LNE_NE_SIG_AREA 25/12/2018
YK York IECC TD_LNE_NE_SIG_AREA 25/12/2018
YZ YKROC Bowesfield Area WestCAD ? ? ? ? 2021-11-15
ZE Eastbourne TDC TD_SUSS_SIG_AREA 29/11/2019

Abbreviations

Code Meaning
ASC Area Signalling Centre
DTD Dual Train Describer
IECC Integrated Electronic Control Centre
ITD Information Train Describer
MCS Modular Control System
NCP Network Control Processor
PSB Power Signal Box
RCC Route Control Centre
ROC Rail Operating Centre
SB Signal Box
SCC Signalling Control Centre
TDC Train Describer Concentrator
BAROC Basingstoke ROC
CVLICC TAM Core Valley Lines Integrated Control Centre - Treherbert, Aberdare, and Merthyr
EMCC East Midlands Control Centre
EXROC Exeter ROC
MRROC Manchester ROC
ROROC Romford ROC
RYROC Rugby ROC
SWCC/WROC South Wales Control Centre/Wales ROC
TBROC Three Bridges ROC
TVSC Thames Valley Signalling Centre
TYROC Tyneside ROC
WMSC West Midlands Signalling Centre
WSSC West of Scotland Signalling Centre
YKROC York ROC


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