BRENTFORD, ENGLAND - SEPTEMBER 17: Prince William, Duke of Cambridge is greeted by CEO of Tusk Trust Charlie Mayhew as he arrives at the Tusk Trust conservation charity 25th Anniversary Ball, which honours the charity's impact in the midst of the continuing crisis facing wildlife in Africa, at Syon House on September 17, 2015 in Brentford, England (Photo by Chris Radburn/WPA Pool/Getty Images)
