Passengers on the East Coast main line have faced major delays because of power line problems.
The problems have been caused by power lines in St Neots, Cambridgeshire but have had a knock on effect for other parts of the line which runs to Scotland.
The East Coast main line is the main link between London and Edinburgh.
East Coast Trains say no services are running between London and Peterborough and they are looking to bring in buses.
The service was advising anyone travelling to or from stations south of Peterborough including King's Cross to travel on Thursday if possible. Tickets for Wednesday can be used or passengers can claim compensation.
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