Trains travelling towards London Liverpool Street from Ilford are being delayed due to a signal fault at Maryland.
The Metro services are facing up to 15-minute delays, while some trains are stopping at Stratford station platform 9.
Abellio Greater Anglia said the signal fault had been cleared but had caused congestion on the London bound mainline.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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