A number of lines that had been blocked in North Norfolk following a signal fault have resumed.
Greater Anglia has reported a number of services may be cancelled, delayed or revised between North Walsham and Cromer on Monday.
No services were running between North Walsham and Sheringham, with a bus replacement service running between the towns.
The defect has been repaired by Network Rail with services resuming, though passengers may see some delays or revisions.
The train operator said: “Due to a signal system fault around the Gunton station area, services will be disrupted.
“Signal system equipment has failed which allows the signaller to see where the trains are on the line. This fault is also affecting Walpole level crossing, where signals are stuck on a red aspect.”
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