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21 December 2010, 15:31 | Updated: 21 December 2010, 15:57
All East Coast train services between Peterborough and London Kings Cross today have been cancelled.
It's after snow caused problems with some overhead power lines in the Huntingdon area.
Because of this, all East Coast trains are starting and terminating at Peterborough.
Passengers trying to travel to London are having to use a rail replacement bus to get to Cambridge, where tickets are being accepted on First Capital Connect and National Express East Anglia services.
However, with journey times being extended significantly as a result of the problems, passengers are being urged to delay their journeys until tomorrow unless they are absolutely essential.
First Capital Connect (FCC) services between Peterborough and London King's Cross are also being affected by the broken power lines.
All fast FCC services to London from Peterborough for the rest of the day have been cancelled, and buses are replacing trains between Peterborough and St Neots on the slower services.
Passengers joining these slower FCC services should expect journey times to be extended by at least an hour.