CHATHAM, UNITED KINGDOM - OCTOBER 13: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) SSG Gary Kearney and WO1 Clive Robertson, divers of the Corps of Royal Engineers practise saluting underwater ahead of an inspection by Queen Elizabeth II as she visits Brompton Barracks in celebration of the Corps of Royal Engineers 300th anniversary on October 13, 2016 in Chatham, England. (Photo by Max Mumby/Indigo/Getty Images)
