Safety investigators trying to establish the cause of the high speed rail crash in Cumbria say they expect to release their initial findings within the coming days.
The inquiry is focusing on a set of points which the Virgin Group train ran across before derailing on Friday night.
There have been calls for an independent public inquiry into the incident that left five other people critically injured.
11 people remain in hospital, including the train driver and two relatives of the 80-year-old woman who was killed in the accident.
180 people were on board when the state-of-the-art Virgin Pendolino tilting train derailed at 150 km/h.
Nine carriages of the Virgin train from London to Glasgow were left on their side with some stuck up in the air after the train slid down an embankment.
Accident investigators spent yesterday studying the wreckage of the Virgin group train.
