Widespread commuter travel delays and chaos this morning have been caused by a "server crash" which meant that information to display screens was not being updated, Network Rail has confirmed.
The server that provides information to display screens crashed this morning and had to be restarted and should catch up later today. This has nothing to do with the system that locates where trains are or track safety.
Network Rail boss Mark Carne is set to face tough questioning from MPs today about the over-running Christmas rail engineering works that led to chaotic scenes in London.
Carne is expected to appear before the Commons Transport Committee, with his network operations managing director Robin Gisby also giving evidence.
The over-running works meant the closure of King's Cross station in London for the whole day of December 27, with Paddington station closed for a time and nearby Finsbury Park station having to shut for a period due to chronic overcrowding.
A Network Rail report published earlier this week revealed poor planning, equipment failures and communication breakdowns all contributed to the delays.
Two bosses of beleaguered Network Rail have been awarded MBEs in the New Year Honours.
Over-running engineering work led to chaotic scenes last Saturday with closures at King's Cross and Paddington stations.
Network Rail's western route managing director Patrick Hallgate, whose responsibilities include routes in and out of Paddington, has been awarded an MBE for services to the economy in south west England.
The firm's south east route managing director David Ward has also been given an MBE for services to the rail industry.
Network Rail Director Mick Carne said the planned £38 billion upgrade to Britain's railways will improve the resilience of the system and the service for passengers.
Speaking to Consumer Editor Chris Choi he said the investment announced today was vital, and that he was "very conscious of the fact" that Network Rail "had a better job to do".
The head of one of the train drivers' trade union has hit out at the Government's strategy for improving the railways and called for the network to be returned to public ownership.
Mick Whelan, the general secretary of Aslef, said the £38bn announced for 2014-19 "only keeps us standing still".
The truth is that, after 20 years of privatisation, things aren't getting better. That's why opinion poll after opinion poll shows that most people - including most Conservative voters - in this country want our fragmented railways brought back into public ownership so we can run a properly integrated public service. It's time to build a better railway for everyone in Britain.
Network Rail has been given £38bn for a massive revamp of Britain's railways - here's how they plan to spend the money.Read the full story ›
The £38 billion revamp to Britain's railways is "a bold plan" but one "customers expect and want to see", the head of Network Rail has told Daybreak.
Mick Carne explained: "We are going to spend about £13bn in the operating and maintenance of the railway, but about £25bn on really making substantial improvements to the railway."
Britain's railways will get a £38bn investment as part of a massive revamp plan designed to tackle growing demand, Network Rail is expected to announce later today.
Plans are expected to include electrification of 850 miles of track from Maidenhead to Swansea and Sheffield to Bedford, as well introducing a 24 hour service to the Thameslink programme.
On top of that, £13bn will be poured into replacing and renewing older parts of the network, such as refurbishing nearly 6,000 sets of points.
Hundreds of stations across the country will be transformed including major schemes at London Bridge, Manchester Victoria, Birmingham New Street and Glasgow Queen Street.
Transport Secretary Patrick McLoughlin said: “A key part of this government’s long term economic plan is investing in world class infrastructure."
However, Network Rail is also braced for a hefty £70m fine from regulators after failing to hit its target for train punctuality.
The chief executive of Network Rail, Mark Carne, has made an "unreserved apology to those who have been let down" by the authority's failings in managing the risks of level crossings.
Speaking on Daybreak, Mr Carne also apologised for the behaviour of Network Rail in dealing with the bereaved.
In response, Chris Bazlinton - father of Olivia Bazlinton, who died at a level crossing in 2005 - said he was "encouraged" by the comments and would be holding Network Rail to account.
Mr Bazlinton added: "I think the future is bright. I think this report will lead to much safer railways."