TOPSHOT - Flowers left as tributes are pictured outside Buckingham Palace in central London, on April 13, 2021, following the April 9 death of Britain's Prince Philip, Duke of Edinburgh, at the age of 99. - Princes William and Harry on Monday issued emotional tributes to their grandfather Prince Philip, whose death on April 9, aged 99, has thrown the younger men together for the first time since an explosive row engulfed the family. (Photo by Tolga Akmen / AFP)