Greater Anglia services from Suffolk to and from London this morning have been disrupted by speed restrictions.
The restriction is in place between London Liverpool Street and Stratford, forcing the rail operator to cancel and alter services into London.
On their website Greater Anglia said: "Due to a speed restriction between Stratford and Liverpool Street trains will have to run at a reduced speed.
"In order to ease congestion and minimalise delays we have had to alter/cancel some services going into Liverpool Street."
Disruption is expected until 12pm.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here