In a post on X (formerly Twitter), Euston Station has warned of disruption to journeys today. In a statement, they said: "For safety reasons, all lines between Milton Keynes and Bletchley were temporarily closed and we have worked quickly to reopen two of the four tracks on the West Coast Main Line.

"Although some trains are running again, we expect this incident to cause significant disruption to journeys today and we are working to recover the timetables as quickly as possible.

"We are very sorry to passengers whose journeys are affected and urge people to check before they travel at http://nationalrail.co.uk."