Current operators
Avanti West Coast | c2c | Chiltern Railways | CrossCountry | East Midlands Railway | Govia Thameslink Railway (Gatwick Express, Great Northern, Southern, Thameslink) | Greater Anglia (Stansted Express) | Great Western Railway | London North Eastern Railway | Merseyrail | Northern Trains | Southeastern | South Western Railway (Island Line) | TransPennine Express | Transport for Wales | West Midlands Trains (London Northwestern Railway, West Midlands Railway)
Open access operators
DB Cargo UK | Elizabeth Line (TfL Rail) | Eurostar | Hull Trains | Grand Central | Heathrow Connect | Heathrow Express | London Overground | Lumo | Wrexham & Shropshire
Sleeper services
Caledonian Sleeper | Night Riviera
Defunct operators
Anglia Railways | Arriva Rail North | Arriva Trains Northern | Arriva Trains Wales | Central Trains | Connex South Central | Connex South Eastern | East Coast | East Midlands Trains | First Capital Connect | First Great Eastern | First Great Western Link | First North Western | Great North Eastern Railway | Midland Mainline | Northern Rail | South Eastern Trains | South West Trains | Thameslink | Thames Trains | Valley Lines | Virgin CrossCountry | Virgin Trains East Coast | Virgin Trains West Coast | Wales and Borders Trains | Wales and West | WAGN | Wessex Trains
Defunct British Rail sectors
British Rail | InterCity | Network SouthEast | Rail Express Systems | Railfreight (Loadhaul | Mainline Freight | Transrail) | Regional Railways (Network NorthWest | ScotRail)
Others
Alphaline | Motorail | Red Star Parcels | Sealink | Seaspeed
Infrastructure
Network Rail | Railtrack
 National Rail
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