Services between Manchester Piccadilly and Crewe will face cancellations tonight after signalling issues at Crewe.
Rail operators say all Transport for Wales trains between the two stations will be cancelled, with services terminating at and starting back from Crewe.
It is unclear when the issue will be resolved.
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Online traffic reporting system Inrix said: "No service on Transport for Wales between Crewe and Manchester Piccadilly due to problems with the signals at Crewe."
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