Trains • United Kingdom
Thameslink
Thameslink is the north-south main line that runs right across London, operated by Govia Thameslink Railway. Using its Class 700 trains, it links Bedford, Luton and Cambridge in the north with Brighton, Gatwick and Sevenoaks in the south, calling at St Pancras International, Farringdon, City Thameslink, Blackfriars and London Bridge along the way.
What is Thameslink?
Thameslink is a main line on the British railway network that runs north to south through the heart of London. Operated by Govia Thameslink Railway, its defining feature is that it links suburbs north of the capital (Bedford, Luton, St Albans, Cambridge, Peterborough) directly with those to the south (Brighton, Gatwick, Sevenoaks, Horsham) without changing onto the Underground. The network serves around 135 stations in regular service and forms the rail backbone of Greater London.
At its centre is the so-called core section, which runs underground between St Pancras International and Blackfriars. This is the busiest part of the line, carrying up to 24 trains per hour in each direction at peak times, roughly one train every two and a half minutes, thanks to Automatic Train Operation introduced under the Thameslink Programme.
The cross-London network and main stations
Through central London, Thameslink calls at five key stations along the core: St Pancras International (interchange with Eurostar and East Midlands services), Farringdon (interchange with the Elizabeth line and the Underground), City Thameslink, Blackfriars and London Bridge. This spine lets you cross the capital on a single journey, which is invaluable for reaching an airport or a suburban station without changing trains.
- Northern branches: Bedford, Luton, Luton Airport Parkway, St Albans City, Cambridge, Peterborough
- Core section: St Pancras International, Farringdon, City Thameslink, Blackfriars, London Bridge
- Southern branches: East Croydon, Gatwick Airport, Brighton, Sevenoaks, Horsham, Rainham
Airport links: Luton, Gatwick and the Class 700 trains
Thameslink is one of the best ways to reach two of London's major airports. Luton Airport Parkway, connected to the terminal by a shuttle, is served by many core-section trains. Gatwick Airport sits on the southern branch: semi-fast services link Gatwick with central London in around 30 minutes, with frequencies reaching up to one train every 15 minutes during the day.
The whole network runs on Class 700 Desiro City units built by Siemens: 60 eight-car and 55 twelve-car trains, delivered between 2015 and 2018. These dual-voltage trains (25 kV overhead north of Farringdon, 750 V third rail to the south) run at up to 100 mph, with air conditioning, digital passenger information and very high capacity, ideal for travellers carrying airport luggage.
Fares, tickets and contactless
Thameslink tickets follow the national British fares structure, split between peak (busiest commuting hours) and off-peak (cheaper, quieter times). On Gatwick to London, off-peak singles start at around £12 to £15 depending on the service and how far ahead you book. Within the London zones, contactless payment and the Oyster card are accepted on a pay-as-you-go basis: simply tap in and tap out, with an automatic daily cap.
To book, you can buy at the station, on the Thameslink website and app, or compare the best combinations on Gopaxo. For longer journeys (Brighton, Cambridge, Bedford), an Advance ticket bought ahead often gives the lowest price, while contactless remains the simplest option for short urban trips.
Travel guides
Thameslink
- London
- Brighton
- Gatwick
- Luton
- Bedford
- Cambridge
- Peterborough
- St Albans
- Sevenoaks
- East Croydon
- Rainham
- Horsham
