Commuters are being warned of major disruption on a number of Greater Anglia train services this morning (September 14).
All lines are currently blocked due to emergency services dealing with an incident between March and Whittlesea.
Train services running through these stations may be cancelled, delayed or revised and disruption is expected to last until at least 10am today.
As a result of the incident, there are long delays for passengers with services including the Colchester to Peterborough line being delayed.
Greater Anglia and Network Rail have said they are sorry if your journey has been affected by this disruption.
Advance purchase tickets holders will be allowed to travel on earlier or later trains if their booked service is cancelled.
We will be bringing you all the latest on this incident in our live blog below. Scroll down for more updates as they happen.