A fault with the signalling system between Hatfield Peverel and Chelmsford means trains have to run at reduced speed. Trains running between Colchester and London Liverpool Street may be cancelled, delayed by up to 20 minutes or revised.
Disruption is expected until 09:00.
Customer advice
Network Rail staff will be on site at 07:10 and will have the problem resolved as soon as possible.
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.