A power outage has caused major disruption to all rail services at Leeds Station.
National Rail said the outage had led to a fault with the signalling system which meant lines were currently blocked, leading to many services being cancelled or delayed.
LNER services between London and Leeds and Bradford Forster Square have been affected as well as all Northern, CrossCountry and TransPennine Express services.
National Rail said the disruption was expected to last until 15:00 GMT.
LNER said due to the severity of the disruption and the number of cancellations, customers were advised to defer travel and use their tickets for services later on or on Monday.
It said passengers would be able to use their tickets with other train companies at no extra cost.
National Rail said engineers were on site and investigating the cause of the problem.
