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WINDSOR, UNITED KINGDOM - MARCH 24: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II and Prince Philip, Duke of Edinburgh attend the traditional Royal Maundy Service at St George's Chapel, Windsor Castle on March 24, 2016 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)

WINDSOR, UNITED KINGDOM - MARCH 24: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II and Prince Philip, Duke of Edinburgh attend the traditional Royal Maundy Service at St George's Chapel, Windsor Castle on March 24, 2016 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)