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Lines reopened: disruption between Stevenage and London expected until 08:30 

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Service alteration details

Incident reported: Tuesday 23 June 2026 at 06:38

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Last updated

Tuesday 23 June 2026 at 08:22

Train operators affected

Route(s) affected

between Stevenage and London

Description

All lines have now reopened following an earlier operation incident between Welwyn Garden City and Potters Bar. Trains running between Stevenage and London may be cancelled, delayed by up to 15 minutes or revised.

Disruption is expected until 08:30.

Customer advice:

Operators are working on recovering the scheduled service, however some trains may still be delayed by up to 10 minutes.

Please talk to station staff, look at information boards or check your journey planner for the latest information.

Planning your journey:

You can see live maps of our network here:

These maps will now show where your journey is likely to be delayed.

You can also use the Great Northern or Thameslink apps to get more information about your journey.

Can you tell me more about the incident?

An operational incident was delaying the journey of a train in this area. This refers to a problem which needed to be investigated before the train and its crew were able to continue.

The railway operates on a number of "failsafe" systems. This means that if a possible fault or a procedural issue is detected, trains will be stopped, or there will be restrictions on how they can move. In many cases, no issue will have occurred, but services will stop as a precaution. In all cases, however, a thorough investigation takes place before it can be decided that the train can move.

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.

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