Railway Codes and other data

A (hopefully) comprehensive listing

Additional information is always gratefully received, whether entirely new records (particularly historical records) or information to fill in gaps or correct errors, via the contact link under the Miscellaneous entry in the navigation bar above. Thank you.

[data] from Railway Codes, of course. Where else?

— A satisfied corporate user

New feature! (sort of) This site now has a secure URL. All pages work with https.

The British railway is, for a variety of reasons, awash with acronyms and codes of various kinds. This web site sets out to explain some of these related to the infrastructure and to operational issues. Not included in this site are abbreviations of company names or information about trains themselves: this information is available elsewhere and the editor's main interest lies in infrastructure.

Taking Aspley Guise as an example, the codes BBM and MD140 apply to the route on which Aspley Guise station sits, and APG, 138000, ASPLEYG, and 62051 (ASPLY GSE) apply to the station itself. All of these codes mean different things, and are used in different ways. This site helps to explain these codes.

Also on this site are lists of pseudo-legal data. The first is a list of British railway services introduced under special legislation. This legislation allows operators to consider certain services as 'experimental' and withdraw them if considered necessary without going through full closure procedures. The second is a list of licences and licence exemptions issued by the Office of the Rail Regulator. There is a list of routes designated as community rail partnerships, and finally a table of franchises with associated dates.

Information about other assets such as signal box prefix codes, electrification mast codes, stations, depots and tunnel lengths is also available here.

For more information about day to day changes with Britain's railway infrastructure, please refer to the infrastructure section of the Railway Observer.

Most of the information contained in this site has taken many hours and letters to different companies to compile: it is hoped that you, the reader, will find it helpful to shed light on some of the codes found in railway documents. The records contained in this site are as complete as possible. If you are able to add to the data, please contact the editor.

Please feel free to quote this site. However, please credit it as your source. Feel free to add a link on your website to here.

The use of a reliable host and dedicated domain name is courtesy of a generous supporter, to whom the editor is indebted.

Identify this! last update 11 April 2026

Can you help the editor identify some old photographs? These are shown here; page updated occasionally.

Wanted

Your photographs! Alnmouth station was officially renamed in 2003 to include the line 'for Alnwick'. Can you supply an image that clearly shows the earlier succinct name sign, taken post privatisation (1 April 1994), please? It doesn't have to be directly of the sign; clearly legible but secondary to another subject is fine.

Your photographs! Hampstead Heath station sign was noted on 24 June 2000 with the line 'for Royal Free Hospital' (as distinct for the more recent 'alight for Royal Free Hospital'). Can you supply an image that clearly shows the earlier name sign, please?

Your photographs! Penshurst station sign was noted on 4 June 2002, in Connex colours, with the addition 'for Chiddingstone Causeway'. Can you supply an image that clearly shows the 'Causeway' element, please?

Railway uniform neck ties, specifically:

§ these purchased and promptly lost at Ashford station after the 24 August 2025 open day. Did you find them?

Reasonable costs paid: please contact the editor if you can help. Thank you.

Additionally, the editor has two uniform ties that are unidentified, shown here. Do you know which organisation issued them?

These pages are used by in alphabetical order:

Now over 120 corporate users external links open in new tab
  1. Advenza Freight former freight forwarder
  2. Aecom consultancy formerly known as Scott Wilson and URS
  3. AGH Engineering electrical and mechanical consultants
  4. Alphatek Hyperformance Coatings rail coatings
  5. Amey infrastructure services/consultancy
  6. Amtrain Midlands staff training and screening
  7. Arcadis consultancy
  8. Arriva Trains Wales former passenger train operating company
  9. Arup consultancy
  10. Aspin Foundations former earthworks contractor
  11. Association of Community Rail Partnerships government/pressure association
  12. AtkinsRéalis consultancy
  13. Babcock Rail infrastructure services
  14. Balfour Beatty Rail Projects infrastructure services
  15. BAM Nuttall construction contractor
  16. Barry Doe independent consultant
  17. Blue Cube Travel travel management
  18. Blue Tree Acoustics energy and acoustic consultant
  19. Bob Wilkes Railways railway operating consultants
  20. course tutor at Bromley Adult Education Centre education establishment
  21. Buckingham Group infrastructure contractor
  22. Carillion former infrastructure contractor
  23. Chiltern Railways passenger train operating company
  24. Coffey ground engineering/geotechnical
  25. Cogitare infrastructure optimisation consultancy
  26. Coombes vegetation management
  27. Cornerstone Information Systems travel industry IT solutions
  28. Costain infrastructure contractor
  29. Cotswold Rail former charter train and freight train operator
  30. cpc Project Services systems management
  31. Credo strategy consultant
  32. Crossrail infrastructure operator
  33. Cubic Transportation Systems consultancy formerly known as Serco Integrated Transport
  34. Datasys software solutions consultant, now part of Tracsis
  35. Delta Rail consultant
  36. Department for Transport government department
  37. East Midlands Trains former passenger train operating company
  38. Emmanuel Richard Consultants yield management consultancy
  39. ESL engineering and construction contractor
  40. Esoterix passenger experience digital tools
  41. Eurostar passenger train operating company
  42. Faithful+Gould construction project and cost management consultancy
  43. FENS Information Limited information services
  44. Filter Worldwide IT solutions
  45. Fone Alarm Installations customer information and monitoring
  46. Frankham Group multidisciplinary engineering consultancy
  47. Galliford Try infrastructure contractor
  48. GeoFurlong infrastructure consultant
  49. Graffica HERMES simulation software
  50. Govia Thameslink Railway passenger train operating company
  51. Great Western Railway passenger train operating company
  52. Haigh Rail infrastructure contractor
  53. High Speed 2 infrastructure owner
  54. Hodge Rail engineering support
  55. HRS Services environmental services
  56. Hyder Consulting consultant
  57. Infotec customer information system designer/supplier
  58. ISC Best Practice CAD models for listed building and railway consents
  59. JCP consulting engineers
  60. Jacobs consultancy formerly known as Ch2MHill, formerly known as Halcrow
  61. J Murphy & Sons infrastructure contractor
  62. JNP Group consulting engineers
  63. Kier Rail infrastructure contractor
  64. KI Transport Consultancy transport consultancy
  65. Lancashire council local government
  66. Landlab landscape architects
  67. Lenz Labs innovation consultancy
  68. Lionverge former infrastructure staff supplier
  69. London Midland former passenger train operating company
  70. MacRail Systems progress reporting and workforce attendance monitoring
  71. MHB Consultants consulting civil engineers
  72. Midlands Connect local government department
  73. Mott MacDonald consultant
  74. MTR Crossrail passenger train operating company
  75. Murphy Group infrastructure contractor
  76. Network Rail infrastructure owner
  77. Nexus Alpha transport information systems supplier
  78. Northern Rail former passenger train operating company
  79. NG Bailey infrastructure contractor
  80. OLE Limited electrification services
  81. Onsite water/drainage specialists
  82. Onwave digital networks
  83. OwenWilliams Railways former consultancy, now part of Amey
  84. Parkeon Transit Systems ticket vending machine manufacturer/maintainer
  85. Peeping Passenger Counts operations consultant
  86. Permanent Rail Engineering (UK) infrastructure installation and maintenance
  87. PRA-Rail Operations operations consultant
  88. Premtech Solutions Limited consultancy
  89. RailAdventure UK train operator
  90. The Railway Engineering Co Ltd consultancy
  91. Ramboll civil engineer
  92. RASIC technology consultant
  93. Ricardo Rail systems consultant
  94. RKG Partnership architect
  95. Rockshore real time information systems
  96. Royal BAM Group construction contractor
  97. RSSB safety and standards
  98. Scientifics chemical analyst
  99. SELRAP campaign group
  100. Severn Valley Railway heritage railway
  101. Siemens equipment manufacturer
  102. SKM Anthony Hunt consultancy
  103. SNC Lavalin consultancy formerly known as Interfleet Technology
  104. Southeastern Railway passenger train operating company
  105. Southern Railway passenger train operating company
  106. South Western Railway passenger train operating company
  107. South West Trains former passenger train operating company
  108. Stirling Geoenvironmental Ltd earthworks examinations
  109. TEF Gauging railway gauging services
  110. telent communications services
  111. Trackmaps infrastructure diagram publisher
  112. Tracsis plc operations and planning systems consultant
  113. Transport Design International light rail specialists
  114. Transport for London government department
  115. Transport for Wales/Keolis Amey Operations passenger train operating company
  116. Transport Scotland government department
  117. Travelogix data reporting software
  118. Trevor Patrick Partnership consultancy
  119. TSP Projects multi-disciplinary solutions
  120. University of Birmingham education establishment
  121. University of East Anglia education establishment
  122. University of Southampton education establishment
  123. Virgin Media O₂ telecommunications provider
  124. Vital Rail infrastructure contractor
  125. Volker Rail infrastructure services
  126. WSP consultancy
  127. WycheGnome passenger information consultancy
  128. XYZ Rail infrastructure contractor formerly known as Stobart Rail
  129. Yorcard smart ticketing

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… and something else last update 8 August 2026

You will find a small collection of railway photographs on the editor's Flickr pages. It is hoped that you find them enjoyable and a little different to the usual 'front three quarters in countryside' views. Click on an image to go to the photos.

Photo collection
Full collection
GWR 158 on Chichester level crossing
Random photo: A GWR class 158 crosses Whyke Road crossing, Chichester
GWR clock
Editor's self-indulgence: GWR branding 'in action'
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