Delays of up to 40 minutes on Grand Central Trains between York and Sunderland due to signalling problem at Thirsk.
Northbound lines have reopened and trains can run through the area with delays.
There is no estimate for a normal service.
Also affecting East Coast, First Transpennine Express and CrossCountry.
More top news
After a day of above average temperatures prepare for a bit of a chill.
As MPs debate whether Donald Trump should be allowed to make a state visit to the UK, protestors in Newcastle have met at Grey's Monument
The Sunderland striker believes David Moyes' side have the experience needed to ensure another year of Premier League football