There is a fault with the signalling system between Selhurst and Streatham Common, closing some lines running between these stations.
As a result, trains may be cancelled, delayed or revised.
This issue is expected to continue to impact services until 08:15.
Customer advice:
This is a recent incident, and teams are working to get more information for you. Your journey is likely to be disrupted, but we don't have an exact estimate for any delays at the moment.
You'll be able to see any further updates on this page, so please continue to check back here.
If you need to use another route, you will be updated shortly.
Planning your journey:
You can see a live map of the network here. This will show where your journey is likely to be affected.
You can also use the app to find up-to-date information.
Can you tell me more about the incident?
At the moment, teams are working with local staff and colleagues at Network Rail to assess the situation.
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.