CIRENCESTER, UNITED KINGDOM - JUNE 15: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Prince George of Cambridge plays with a polo mallet as he and his mother Catherine, Duchess of Cambridge watch Prince William, Duke of Cambridge & Prince Harry play in the Jerudong Trophy charity polo match at Cirencester Park Polo Club on June 15, 2014 in Cirencester, England. (Photo by Max Mumby/Indigo/Getty Images)
