R (Drysdale) v HMAC Manchester (South) [2025] EWHC 1850 (Admin) 18 July 2025, judgment here
To what extent an inquest must investigate possible causes of death is often a perplexing question. Until oral evidence is explored in a hearing it may not be known whether a possibility will crystallise into probability and so lend itself to a meaningful inquest conclusion. In this case the criticism levelled at the coroner was that he had prevented some questioning of an expert and so not permitted relevant possibilities to be explored.
Although there was some limited research evidence supporting a possible correlation between the prescription of an anti-psychotic drug and the development of fatal leukaemia, the judge was not persuaded the coroner had been wrong when he exercised his r.19(2) power.
Once the expert had confirmed the evidence of a causative association was scant, the Area Coroner had been correct to prevent additional questioning on the issue. There could not have been any meaningful inquest conclusion based on the expert evidence, since it revealed no more than a theoretical possibility which could not support factual or legal causation.