Abellio Greater Anglia
Services leaving Liverpool Street for Suffolk and Essex are being delayed because of a track fault.
The problem is at Seven Kings station in London and is only affecting trains in the down (away from Liverpool Street) direction.
Trains travelling to the capital from Ipswich and Colchester are unlikely to be affected.
It is estimated trains will be delayed by around 10 minutes through the station, and this is likely to last until midnight.
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