Who is the Queen's top Royal doctor?
Professor Sir Huw Thomas is the Head of the Medical Household and Physician to the Queen.
Sir Huw has been Head of the Medical Household since 2014 and was knighted last year after being invested with the Insignia of a Knight Commander of the Royal Victorian Order.
Sir Huw, who is also a professor of gastrointestinal genetics at Imperial College London's department of surgery and cancer, has previously spoken of how grateful he was to be recognised for his service.