(L-R) Britain's Prince William, Duke of Cambridge, Peter Phillips and Britain's Prince Harry, Duke of Sussex, follow the coffin into St George's Chapel for the funeral service of Britain's Prince Philip, Duke of Edinburgh in Windsor Castle in Windsor, west of London, on April 17, 2021. - Philip, who was married to Queen Elizabeth II for 73 years, died on April 9 aged 99 just weeks after a month-long stay in hospital for treatment to a heart condition and an infection. (Photo by Arthur EDWARDS / various sources / AFP)