Britain's Queen Elizabeth and prince Philip leave the Easter Sunday service in Windsor Castle, in Windsor, April 16, 2017. REUTERS/Peter Nicholls WINDSOR, UNITED KINGDOM - APRIL 16: (L-R) Autumn Phillips, Princess Eugenie, Princess Beatrice, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, Lady Louise Windsor, Sophie, Countess of Wessex and Prince Edward, Earl of Wessex attend the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Peter Nicholls/WPA Pool/Getty Images)

Britain's Queen Elizabeth and prince Philip leave the Easter Sunday service in Windsor Castle, in Windsor, April 16, 2017. REUTERS/Peter Nicholls  WINDSOR, UNITED KINGDOM - APRIL 16:  (L-R)  Autumn Phillips, Princess Eugenie, Princess Beatrice, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, Lady Louise Windsor, Sophie, Countess of Wessex and Prince Edward, Earl of Wessex attend the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Peter Nicholls/WPA Pool/Getty Images)