Football supporters travelling to Wembley for the Championship play-off final were warned of delays or cancellations due to a series of train faults.
On Saturday morning, LNER said it was experiencing "major disruption" to services due to several trains requiring repairs on the East Coast Main Line.
Sheffield United and Sunderland compete for a place in the Premier League this afternoon, with the game kicking off at Wembley at 15:01 BST.
In an update at 13:00, LNER said the faults had caused a couple of cancellations but the majority of services were now running smoothly.
Routes affected include LNER services between Inverness, Aberdeen, Edinburgh, Newcastle, Harrogate, Leeds, Bradford Forster Square, Skipton, Hull, Lincoln and London King's Cross.
Lumo services between Edinburgh and King's Cross are also impacted.
Passengers on cancelled journeys can travel on any LNER service, the firm said, or use their tickets on routes operated by other rail firms.
Earlier this week, Sheffield United supporters were warned about planned bank holiday rail engineering works also impacting journeys.