Network Rail 'has questions to answer'
The chair of the Transport Select Committee has said Network Rail has questions to answer about disruption over the weekend, some of which is still going on.
Louise Ellman was referring to problems affecting King's Cross station caused by a signalling issue and overrunning engineering works.
A revised service is now operating on Great Northern routes in and out of London.
Emma North reports from King's Cross.
29 Dec 2014