FILE - In this Monday, June 8, 2015 file photo, Britain's Prince Philip, the husband of Queen Elizabeth II, arrives for a visit to Richmond Adult Community College in Richmond, south west London. On what would have been Prince Philip's 100th birthday, his youngest child Prince Edward, Earl of Wessex, said in an interview with the BBC broadcast on Thursday June 10, 2021, he would not have been looking forward to any celebrations to mark the occasion. (AP Photo/Matt Dunham, Pool, File)

Britain's Queen Elizabeth II views the garden border after receiving a Duke of Edinburgh rose, at Windsor Castle, England, Wednesday June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)

Britain's Queen Elizabeth II inspects a rose border after receiving a Duke of Edinburgh rose, at Windsor Castle, England, Wednesday June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)

Britain's Queen Elizabeth II receives a Duke of Edinburgh rose, given to her by Keith Weed, President of the Royal Horticultural Society, at Windsor Castle, England, Wednesday, June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)

Britain's Queen Elizabeth II receives a Duke of Edinburgh rose, given to her by Keith Weed, President of the Royal Horticultural Society, at Windsor Castle, England, Wednesday June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)

Britain's Queen Elizabeth II receives a Duke of Edinburgh rose, with Keith Weed, centre, President of the Royal Horticultural Society, at Windsor Castle, England, Wednesday June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)

Britain's Queen Elizabeth II looks at flower beds after receiving a Duke of Edinburgh rose, given to her by Keith Weed, centre, President of the Royal Horticultural Society, at Windsor Castle, England, Wednesday June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)

Britain's Queen Elizabeth II receives a Duke of Edinburgh rose, given to her by Keith Weed, President of the Royal Horticultural Society, at Windsor Castle, England, Wednesday, June 9, 2021. The newly bred deep pink commemorative rose has officially been named in memory of the late Prince Philip Duke of Edinburgh. A royalty from the sale of each rose will go to The Duke of Edinburgh's Award Living Legacy Fund to support young people taking part in the Duke of Edinburgh Award scheme. (Steve Parsons/Pool via AP)