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Michael Roberts, director general of the Rail Delivery Group, said: "Hundreds of rail staff have been working throughout the night and the morning to monitor the weather, prepare to react quickly to problems on the lines and keep passengers safe and informed.
"Many lines are open but some are running reduced timetables with the most severely affected areas being Scotland and parts of Northern England. Delays are possible so customers should check National Rail Enquiries before they decide to travel. A number of operators have lifted restrictions to allow tickets from today to be used tomorrow, and we advise passengers to check with their train company."
