Overnight flooding has caused severe disruptions to rail services in the region.
Floods between Maryland and Shenfield have greatly affected trains travelling between the region and the capital, with several trains cancelled already this morning.
Four services from Norwich to London Liverpool Street have been cancelled already, including the 7.40am.
In the other direction, the 7.55am and the 9am from London Liverpool to Norwich has also been cancelled.
There are also delays of up to an hour to services travelling through Brandon, Diss, Downham Market, Eccles Road, Harling Road, Lakenheath, Littleport, Salhouse, Shippea Hall, Spooner Road, Thetford, Watlington and Wymondham.
A statement from Abellio Greater Anglia read: 'Signalling equipment between Seven Kings was damaged yesterday due to heavy rain flooding the railway.
'Train services running through these stations may be cancelled, delayed by up to 60 minutes, or revised. Disruption expected until 12pm 24/06.
'Please do not travel unless necessary.'
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