Buses are replacing trains between Ipswich and Felixstowe because of signalling problems.
The disruption, which has been caused by a fault at Derby Road station, is expected to last until noon.
Journey times are being extended by 40 minutes on the replacement buses.
Greater Anglia’s delay repay policy can by found at www.abelliogreateranglia.co.uk/about-us/our-performance/delay-repay
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