Delays of up to one hour on East Coast between Edinburgh Waverley and York due to earlier broken down train at Morpeth.
The southbound line has re-opened and trains can run through the affected area with delays and possible cancellations.
There is no estimate for a normal service. Also affecting CrossCountry.
More top news
Think-tank IPPR North has suggested a so-called Northern Brexit Negotiating Committee to advise the Government on Brexit
As October starts are we seeing more autumnal weather?
Sunderland boss David Moyes says agent's fees should be made public to keep football transparent after a week of allegations