A fault on a train between Alexandra Palace and Stevenage means trains may be cancelled or revised.
Disruption is expected until 08:00.
Great Northern and Thameslink Customer Advice
Please allow extra time to complete your journey this morning.
Services running towards Welwyn Garden City will be unable to call at the following stations after Alexandra Palace :
- Potters Bar
- Brookmans Park
- Welham Green
- Hatfield
At this time we advise to take a train to Welwyn Garden City and travel back to these stations to complete your journey.
Teams are working with Network Rail and will update you as we receive more information.
Can you tell me more about this incident?
Normally, when a fault on a train occurs, crews will gather details and report this to our Fleet teams. If possible, the defect will be fixed promptly, and teams will get the train on the way. Initial steps are designed to take around 10 minutes.
However, sometimes the fault cannot be fixed in this time frame. In this case, wherever possible, the train will be taken out of use and sent to a depot. This does take additional time, as the crew will need to make sure that everyone's managed to leave the train.
If this can't be done either, teams send specialist engineers to site, known as "fitters". Teams have fitters based in key locations around the network, 24 hours a day, and they are able to attend anywhere on routes.
Until the defective train can be moved, teams will try to find a way to get other trains around the issue. This depends how many lines are available, and whether the signalling equipment is set up to allow trains to be routed around the problem. This is more often the case on major routes, but not always.
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.