The Rail Accident Investigation Branch (RAIB) has launched an investigation into the dramatic landslip that derailed a train between Lochailort and Glenfinnan in the Scottish Highlands.
The front car of a two-car ScotRail service was derailed early in the morning on 22 January after being struck by a landslip.
More than a thousand tonnes of material slipped and covered the West Highland Line, destroying a section of fence which had only recently been installed to protect the line from falling boulders.
There were no injuries reported among the train’s five passengers and two crew members but passengers had to be evacuated by road-rail vehicle.
In the days after the landslip, Network Rail carried out repairs to the track and installed additional drainage. The line reopened on 29 January.
RAIB will look into the arrangements that were in place to protect the railway from landslip in that area and Network Rail procedures for managing the combined effect of rain and melting snow.