O’Brien v HM Assistant Coroner for Sefton, Knowsley and St Helens [2025] EWHC 362 (Admin) (heard in September 2024) the recently un-embargoed judgment is here
The Court of Appeal made the point resoundingly clear in Morahan[1] that “an inquest remains an inquisitorial and relatively summary process”. As this latest case illustrates a Coroner may well be under a duty to seek out and record as many facts as the public interest requires, but this will not mean that the scope of an inquest must always be as wide as the Interested Persons might demand. Rather, as the Master of the Rolls said in Dallaglio:
“It is for the coroner conducting an inquest to decide, on the facts of a given case at what point the chain of causation becomes too remote to form a proper part of his investigation. That question, potentially a very difficult question, is for him.”
The touchstone for the Scope of any inquest will be what was called in this case ‘Coronial Causation’, a term flowing from the decision in Tainton where the President had noted the difference between the threshold for causation of death and the standard of proof required to prove causation of death at an inquest.
The conduct or event must make an actual and material (that is more than minimal) contribution to the death. Depriving the deceased of an increased chance of life, or making their death more probable than it would otherwise have been will not be enough to satisfy the causation threshold for a coroner.