Below are the major train operators that covers Great Britain (United Kingdom).
- Arriva Rail London – London Overground
- Avanti West Coast
- c2c
- Caledonian Sleeper
- Chiltern Railways
- CrossCountry
- East Midlands Railway
- Elizabeth line
- Eurostar
- Govia Thameslink Railway, Gatwick Express, Great Northern, Southern and Thameslink
- Grand Central
- Greater Anglia – Stansted Express
- Great Western Railway
- Heathrow Express
- Hull Trains
- London North Eastern Railway
- Lumo
- Merseyrail
- Northern Trains
- ScotRail
- Southeastern
- South Western Railway – Island Line
- TransPennine Express
- Transport for Wales Rail
- West Midlands Trains and London Northwestern Railway
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