Disruption between London St Pancras International and London Bridge / Elephant & Castle expected until 09:30
Service alteration details
Incident reported: Tuesday 02 December 2025 at 07:09
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Last updated
Tuesday 02 December 2025 at 08:27
Train operators affected
Route(s) affected
Between Peterborough and Three Bridges / Horsham, between Cambridge and Brighton, between Bedford and Rainham (Kent) / Gatwick Airport / Three Bridges / East Grinstead / Haywards Heath / Horsham / Brighton, between Flitwick and Three Bridges, between Luton and Elephant & Castle / Rainham (Kent) / Orpington, between Welwyn Garden City / Finsbury Park and Sevenoaks, between St Albans City and Sutton (Surrey), and also between West Hampstead Thameslink and Orpington
Description
A fault with the signalling system at London Blackfriars means that fewer trains are able to run on the line towards London Bridge / Elephant & Castle. As a result, trains running between London St Pancras International and London Bridge may be cancelled, delayed by up to 30 minutes or revised.
Disruption is expected until 09:30.
Customer advice:
You may need to change trains to complete your journey and allow extra time to arrive at your destination.
Services running towards London Bridge are being affected by delays of up to 15 minutes.
Please make sure to check journey planners and information boards for the latest train information and allow extra time to arrive at your destination.
How the service is being affected:
Trains that normally run between Bedford and East Grinstead have been suspended
Trains that normally run between Luton and Orpington have been suspended
Trains that normally run between Cambridge and Brighton have been suspended
Trains that normally run between between Welwyn Garden City and Sevenoaks will terminate and restart at London Blackfriars
Trains that normally run between Bedford and Three Bridges will terminate and restart at Gatwick Airport
Ticket acceptance:
You can use your ticket at no extra cost to travel on:
North of and throughout London:
Alternative Great Northern and Thameslink services on any reasonable route towards your destination
London Underground through and around London, as well as on the Northern line to High Barnet and Edgware
London Buses between London St Pancras International / London Kings Cross and East Croydon on any reasonable route
South of London:
Alternative Southern and Thameslink services on any reasonable route towards your destination
Gatwick Express services between London Victoria and Gatwick Airport / Brighton
London Underground through and around London, as well as on the Northern line to High Barnet and Edgware
London Buses between London St Pancras International / London Kings Cross and East Croydon on any reasonable route
Metrobus routes:
3 between Gatwick Airport, Three Bridges, and Crawley
10 between Gatwick Airport and Crawley
20 between Horley, Gatwick Airport and Three Bridges
100 between Redhill, Earlswood (Surrey), Salfords (Town), Horley (Town), Gatwick Airport, Three Bridges and Crawley
272 between Three Bridges, Crawley, Haywards Heath, Wivelsfield, Burgess Hill, Hassocks, Preston Park, and Brighton
411 between Merstham, Redhill, and Reigate
424 for Redhill, Reigate, Horley, Crawley
Planning your journey:
You can see the live departure boards, and view a live map of the network.
You can also view an alternative route guide.
If you're travelling in the London area, you can plan journeys on alternative routes by using the TfL Journey Planner.
You can use the Thameslink app to find up-to-date information.
Can you tell me more about the incident?
This part of the network uses track circuits to detect trains. If a circuit fails, the system may think a train is still there, blocking others from moving forward.
Drivers must stop at red signals and get verbal permission to proceed at a reduced speed, which can cause significant delays, especially in areas with long track sections.
Faults can be caused by electronic issues or track obstructions. Network Rail is investigating, and updates will be shared as we have them.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.