The next national rail timetable change is for journeys from Sunday 14 December 2025.
For Govia Thameslink Railway’s Southern, Thameslink, Great Northern and Gatwick Express services, the changes in this next timetable are focused on the East Coast Main Line – the route that connects London with Stevenage, Peterborough and Cambridge – where extra Great Northern services will run in the peaks to provide extra capacity, alongside changes to times and stopping patterns.
There are also important changes for Southern, with changes to improve peak time inner-London capacity, new long distance services into London Bridge and extra trains on some weekdays for East Grinstead to support off-peak travellers.

We always recommend customers check their journeys on the journey planners on our websites in advance of any timetable change, especially if they involve connections between trains.
A summary of the changes is available below and on our websites:
● https://www.southernrailway.com/service-updates/timetables
● https://www.thameslinkrailway.com/service-updates/timetables

More information on the Great Northern changes as part of the wider East Coast Main Line timetable update is available here: East Coast Main Line improvements.