Thameslink timetable changes from December 2026
From Sunday 13 December 2026, we will be introducing some targeted changes to Thameslink services on the Midland Main Line route.
These changes have been developed following a detailed review of performance and are designed to deliver a more reliable and resilient service for customers.
The revised timetable will help reduce the impact of delays across the network, improve service recovery when disruption occurs and create a stronger foundation for future growth and improvements along the route.
While some customers will see changes to their journey options, frequent services will continue to operate and peak-time capacity will be maintained where demand is highest.
Why are these changes being made?
The current timetable includes a number of services with limited flexibility to recover from delays. Tight turnaround times, challenging running schedules and complex interworking between some Thameslink services can make it difficult for trains to recover quickly when disruption occurs.
In some cases, delays can continue to affect customers long after the original incident has been resolved.
The revised timetable has been designed to:
- Improve punctuality and reliability.
- Reduce the impact of delays spreading across the network.
- Create a more resilient timetable that can recover more quickly when disruption occurs.
- Maintain capacity during the busiest periods of the day.
- Support future growth and planned improvements across the Midland Main Line.
The changes form part of a wider programme of timetable improvements across the Midland Main Line, helping create a stronger foundation for future growth associated with housing development, the expansion of London Luton Airport and the future Universal Studios Bedford development.
What is changing?
Customers on the Sutton Loop
Customers travelling from stations on the Sutton Loop – the section between Sutton, Streatham and Elephant & Castle – will gain a new direct all-day service to Luton Airport Parkway and Luton.
Two of the four Thameslink services each hour that currently operate between Sutton and St Albans will be extended through to Luton and call at all the intermediary stations, providing new direct journey opportunities between south London, Hertfordshire and Bedfordshire.
Services from St Albans to Sutton via Carshalton will instead start at Luton, and services from Sutton to St Albans via Wimbledon will instead run through to Luton.
Services between Kentish Town and St Albans
Off-peak and Saturday service frequency at Brent Cross West, Mill Hill Broadway, Elstree & Borehamwood and Radlett will reduce from six trains per hour to four trains per hour, and the times of trains will change.
Customers at these stations will continue to receive a frequent service throughout the day, with trains operating at regular 15-minute intervals, and will benefit from a timetable designed to improve reliability and resilience across the route.
Services between Luton, London and Rainham
The Thameslink services that currently operate between Luton and Rainham will instead run between Kentish Town and Rainham during off-peak periods on weekdays and on Saturdays. These services already operate between Kentish Town and Rainham on Sundays.
Customers travelling between the Rainham route and destinations north of Kentish Town will still be able to make these journeys by changing trains at stations such as London Bridge, Blackfriars or Farringdon, where frequent onward connections to other Thameslink, Southeastern and Elizabeth Line services are available.
In many cases, these connections will provide a similar or faster overall journey time than the current direct service, and same platform connections between services are available at stations like London Bridge and Blackfriars.
Peak-time services will continue to start and end at Luton or Bedford, maintaining capacity and frequencies for stations between Kentish Town and St Albans whendemand is highest.
Journey time changes
Some timetabled journey times between St Albans and London St Pancras will increase by approximately two to five minutes.
These changes better reflect how services operate day to day and are designed to support a more reliable and resilient timetable.
Looking ahead
These changes form part of a wider programme of improvements across the Midland Main Line.
We continue to monitor customer demand and future growth opportunities across the route, including major housing developments, the expansion of London Luton Airport and the future opening of Universal Studios Bedford.
The December 2026 timetable provides a stronger and more resilient foundation from which future improvements can be developed as demand grows.
Advice for customers
The new December 2026 timetable is now available to view in journeys planners and booking systems. Please check your journeys as train times and service options may differ from the current timetable.