Errors in the Carillion-built drainage system caused the 2020 Stonehaven rail crash, the Rail Accident Investigation Branch (RAIB) said today.
According to the investigation, design differences and the way the system was built meant that it was unable to sustain the amount of rail falling on the morning of 12 August 2020 in Aberdeenshire, Scotland.
The incident took place at 9.38am when a ScotRail train derailed after hitting gravel and other material coming from the drain.
The train smashed into a bridge, causing one of its carriages to fall down an embankment and leading to the death of three people, including the conductor and driver.
The RAIB reported that Carillion had installed a structure to protect against leaks and did not notify Network Rail of the changes.
Investigators said that if the bund had not been installed, it was “highly likely to have safely accommodated the flow of surface water.”
Carillion went into compulsory liquidation in 2018.