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ASCOT, ENGLAND - JUNE 20: Queen Elizabeth II and The Duke of Edinburgh arrive on day 1 of Royal Ascot at Ascot Racecourse on June 20, 2017 in Ascot, England. (Photo by Alan Crowhurst/Getty Images for Ascot Racecourse)

ASCOT, ENGLAND - JUNE 20: Queen Elizabeth II and The Duke of Edinburgh arrive on day 1 of Royal Ascot at Ascot Racecourse on June 20, 2017 in Ascot, England. (Photo by Alan Crowhurst/Getty Images for Ascot Racecourse)