Abellio Greater Anglia
Trains running between Essex and Suffolk and the capital face delays, alterations and cancellations due to a defective piece of track at Harold Wood.
Disruption is expected to last until 10am as speed restrictions have led rail operator Abellio Greater Anglia to cancel some services, while others face delays of around 10 minutes.
A number of services were cancelled or severely altered this morning, but disruption now centres around delays of up to 10 minutes due to a speed restriction on the affected piece of track.
For full alterations visit the Abellio JourneyCheck web site.
Abellio and Network Rail have apologised for any inconvenience caused.
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