NETWORK RAIL was battling to re-open six platforms at King's Cross Station in London as NCE went to press, following a derailment on Tuesday morning.
A GNER train came off the tracks at a set of points that had not been set properly or checked following overnight maintenance work by contractor Jarvis Rail.
The accident happened at 7am on Tuesday as the train was leaving King's Cross platform four. It was travelling at 15km/h-25km/h when it hit the points and the locomotive and first carriage were derailed.
Jarvis had been carrying out work on points just beyond the platforms on Monday night.
Power was meant to have been disconnected from the points, and they should have been set for trains to travel straight ahead.
This was not done, and the omission was not picked up by Jarvis's senior engineer, a spokesman for the firm said.
As NCE went to press Jarvis was investigating whether statutory checks had been carried out before the line was handed over to Network Rail for train operations.
The Health & Safety Executive and British Transport Police are carrying out a separate inquiry into the incident.
A Network Rail spokesman said that repairs would be needed to the track and train.