Railway passengers travelling between Norwich and London faced disruption on Friday to a broken-down train.
The train broke down between Norwich and Diss on the line towards Liverpool Street.
Greater Anglia said all lines had reopened by around 7.30am but, services running to and from these stations were cancelled, delayed by up to 30 minutes or revised as a result of the breakdown.
The operator said related disruption ended shortly after 10.30am.
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