A major forensic report into Russian tycoon Boris Borozevsky's death found no evidence of poisoning or radiation, an inquest has heard.
Peter Bedford referred to a 22-page report submitted by forensic scientist Raymond Fysh, which detailed tests for poisoning including radiation and found no evidence of any.
A statement read out earlier by forensic scientist Sarah Tarrant said toxicology tests found traces of various prescription medicines in Mr Berezovsky's system, although it was not possible to tell when they had been taken or in what quantity.
Ms Tarrant also said she "couldn't rule out the possibility that he had ingested morphine or possibly even heroin", though the latter could have come in the form of poppy seeds found in food and herbal teas.
More top news
Palmerston, the Foreign Office's resident cat, caught his first mouse on Tuesday.
An American serviceman has been killed "as a result of enemy fire" in Iraq, officials have confirmed.
The parents of five-month-old Nora Hall are preparing to turn off their daughter's life support machine after she suffered a massive stroke.