FLEET, UNITED KINGDOM - MARCH 11: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Zara Phillips competes, on her horse 'Gladstone', in the cross country phase of the Tweseldown Horse Trials at Tweseldown Racecourse on March 11, 2017 in Fleet, England. (Photo by Max Mumby/Indigo/Getty Images)