Last modified on Tue 2 Mar 2021 00.10 EST The Duke of Edinburgh has been transferred to St Bartholomew’s hospital in London, and Buckingham Palace has announced that the 99-year-old required observation for an existing heart condition. It is not known if his earlier admission to King Edward VII’s hospital in central London was as a result of this condition, or unrelated. The only details previously given were that he was treated for a non-Covid-19-related infection and was responding to medication. But his transfer may indicate that his heart condition now necessitates more specialist treatment than is possibly available at the King Edward VII, the hospital of choice for senior royals.