Failings by Network Rail and collapsed outsourcing giant Carillion caused the Stonehaven rail crash, an investigation has found.
Errors in the construction of a drainage system by the construction firm meant it was unable to cope with heavy rain which fell in Aberdeenshire on the morning of the crash on 12 August 2020, the Rail Accident Investigation Branch (RAIB) said.
Three people were killed when a ScotRail train derailed at 9.37am after hitting gravel and other stony material washed out from the drain.