The firm's lawyers appeared at Lancaster Magistrates' Court for breaching health and safety law, following criminal proceedings started by the Office of Rail Regulation.
Network Rail, which is responsible for track maintenance, is facing a charge under the Health and Safety at Work Act.
Stretcher bars holding the moveable rails a set distance apart when the points are operated failed, causing the train to derail.
Network Rail (NR) is facing an unlimited fine after its lawyers said they would plead guilty to health and safety breaches leading up to the fatal train crash in Greyrigg in Cumbria.
5 years after the Grayrigg train crash criminal proceedings begin today in Lancaster.On the 23rd of February 2007 Margaret Masson, 84, was killed and 88 others injured when faulty points caused the London Euston to Glasgow service to derail throwing all eight carriages down an embankment.