All British military deaths can be subject to inquiry, usually by the nearest coroner to where the body landed in the UK, which has upped the Oxford coroners workload in recent years.
O.K., that has a certain sense to it from a historical perspective, I'm assuming the law on the inquest dates back to at least the French/English war (i.e the one that went from about 1000 to Napoleon's defeat) where you might have military death corpses washing up on any English beach.
Is there any movement to consolidate military death inquests into one governing investigative jurisdiction?