A safety inspection of the track in the Maryland area is resulting in some lines being blocked between Romford and London Liverpool Street.
Trains may be cancelled, delayed or revised. Disruption is expected until 18:00.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner
Twitter:
If you would like to follow this incident on Twitter, please use #Maryland
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.
Feedback:
We want to make information better - tell us how! Fill out this online Disruption Survey.