Links to train companies that form part of the National Rail network can be found by looking in the train operating company index page.

• Croydon Tramlink Addington, Beckenham, Croydon, Wimbledon
• Docklands Light Railway Bank, Tower Gateway, Stratford, Lewisham
• Glasgow Underground
• Heathrow Express
• London Underground
• Manchester Metrolink Bury, Eccles, Altrincham
• Midland Metro Birmingham, West Bromwich, Dudley Wolverhampton
• Nottingham Express Transit Hucknall, Bulwell, Nottingham
• Railway Heritage Association lines for tourists and enthusiasts
• Sheffield Supertram Halfway, Meadowhall, Middlewood
• Tyne & Wear Metro Sunderland, South Shields, Gateshead, Tynemouth, Newcastle and airport
• West Coast Railway Co. STEAM York – Scarborough & Fort William – Mallaig

• Assoc. of Community Rail Partnerships
• ATOC Assoc. of Train Operating Companies
• British Transport Police
• BritRail for overseas visitors
• Careers and recruitment
• Department for Transport
• First Group
• Go-Ahead
• Institution of Railway Operators
• LocoScene
• National Express
• National Railway Museum
• Network Rail (formerly Railtrack)
• ORR Office of the Rail Regulator
• Oyster Card Information on London's travel smartcard.
• PLUSBUS gives you unlimited travel on most buses at either or both ends of your rail journey
• Rail Freight Group
• RPCs Rail Passengers Council and Committees
• Rail Safety and Standards Board
• Railfuture
• Railtours
• Railwatch
• Railway Children charity
• Railway Forum
• Railway Mission
• Railway Study Association
• Settle–Carlisle Partnership
• SRA Strategic Rail Authority
• Steam excursions and tours
• The Train Chartering Company Ltd
• Trakkies for children of all ages
• Transport for London
• Transport 2000

• Denmark
• Eurostar
• Finland
• France
• Germany
• Italy
• Ireland
• Luxembourg
• Netherlands
• Northern Ireland
• Rail Europe
• Spain
• Sweden