Royals 'are a family in mourning' after Prince Philip dies aged 99: Queen's heartbreak after husband's death was 'unexpected' despite hospital stay - as Charles 'takes comfort' that he spent more time with father in recent weeks Her Majesty announced death of her husband of 73 years at midday Friday and joins 'the world in mourning' Philip was in Windsor after being treated for an infection and pre-existing heart condition for 28 nights Prince Charles was seen leaving Windsor Castle last night after visiting his mother following Philip's death Duke of Edinburgh had kept a low profile since conducting his final solo public engagement in August 2017