There are delays of around one hour and thirty minutes on the East Coast mainline because of an incident at Peterborough.
It s believed that a man was threatening to jump off a bridge.
He has now been moved but trains are severely delayed through the area.
Disruption is affecting services between Kings Cross and Edinburgh Waverley and between Kings Cross and Leeds because of the earlier incident.
Trains affected are, East Midlands, Grand Central, Cross Country and First Hull trains.