Continued delays after rail disruption
Rail passengers continue to face some delays at London stations.
Network Rail said overrunning engineering works meant trains going in and out of King's Cross station were cancelled on Saturday.
The rail company's managing director Robin Gisby has apologised for the disruption, saying "we've let a lot of people down".
The Office of Rail Regulation is to investigate the delays.
BBC London's Emma North spoke to Nigel Harris, the managing editor of Rail Magazine.
28 Dec 2014