Trains struck location cabinet doors, Chipping Sodbury tunnel, Gloucestershire, 20 February 2017.
Chief Inspector of Rail Accidents
Rail Accident Investigation Branch Derby
Telephone 01332 253300
Rail Accident Investigation Branch Farnborough
Berkshire Copse Road
GU11 2HP (Satnav GU11 2HH)
Telephone 01932 440000
Make an FOI request
Jobs and contracts
Read our policy on Social media use.