There is a fault with the signalling system between Romford and Stratford, closing some westbound lines between these stations.
This means that trains may be cancelled or delayed by up to 20 minutes.
This issue is expected to continue to impact services until 17:30.
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.