A reasonable question.
The Coroner is duty bound to investigate the circumstances of ANY sudden or unexplained death. Since the bodies of Servicemen killed abroad are repatriated through RAF Brize Norton, it falls to the Oxfordshire Coroner to carry out this task. I understand that the volume of work (the military cases being in many circumstances controversial) has caused additional resources to be made available to the Oxfordshire Coroner's office.
Sven