- 1 update
Two people were injured when the Virgin service derailed and hit the buffers at Chester station on November 20.
The Rail Accident Investigation Branch (RAIB) said a rain shower had "reduced adhesion" between the rails and the wheels of the vehicle.
The train driver and on-board safety systems were able to slow the vehicle and bring it down to a safer speed.
Sand was fired onto the wheels to improve adhesion as the train approached the buffers, the report's author said.
The RAIB also found the old-style buffer stop had only minimal capacity to absorb energy and was destroyed by train which mounted the platform.