There is a fault on a train between Oakleigh Park and Finsbury Park. A a result of this, trains between Potters Bar and Finsbury Park may be delayed or revised.

Disruption is expected until 13:00.

Customer Advice:

Services will be unable to stop at the following stations in the direction of Moorgate and London Kings Cross:

• Oakleigh Park
• New Southgate

The following stations will have a reduced London-bound service stopping there:

• Alexandra Palace
• Hornsey
• Harringay

If you are travelling from either Oakleigh Park or New Southgate towards London, we'd advise taking a northbound train to New Barnet or Potters Bar, changing there for a London-bound train.

If you are travelling to Oakleigh Park or New Southgate on a London-bound train, you should stay on the train until Finsbury Park and change there for a service back to your destination.

If you are travelling from Alexandra Palace, Hornsey or Harringay towards London, please use alternative Great Northern services to Moorgate. You can change at Finsbury Park for alternative services to Kings Cross.

If you are travelling to Alexandra Palace, Hornsey or Harringday on a London-bound train, you should stay on the train until Finsbury Park and change there for a service back to your destination.

Planning your journey:

Live departure boards can be found here.

You can view a live map of the network here.

You can see the alternative route guide here.

If you're travelling in the London area, you can plan journeys on alternative routes by using the TfL Journey Planner here.

Can you tell me more about the incident?

We've had a report of a fault on a train, and this is now causing delays to other services travelling through this area.

Normally, when a fault on a train occurs, our crews will gather details and report this to our Fleet teams. If possible, the defect will be fixed promptly, and we'll get the train on the way. Our 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, we'll send our specialist engineers to site, known as "fitters". We have fitters based in key locations around the network, 24 hours a day, and they are able to attend anywhere on our routes. Once they are on site, we'll then monitor progress updates and ensure that the railway can be reopened as promptly as possible.

Until the defective train can be moved, we 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 our major routes, but not always. We'll work with Network Rail's controllers to decide how many more trains can be sent through the area, and if this isn't possible, we'll see what alternative solutions are available to help you continue your journey.

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.