STAMFORD, UNITED KINGDOM - FEBRUARY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge joins in with a team building exercise during a visit to RAF Wittering to meet air cadets taking part in a half-term skills development camp on February 14, 2017 in Stamford, England. The Duchess of Cambridge is Royal Patron and Honorary Air Commandant of the Air Cadet Organisation. (Photo by Max Mumby/Indigo/Getty Images)

STAMFORD, UNITED KINGDOM - FEBRUARY 14: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge joins in with a team building exercise during a visit to RAF Wittering to meet air cadets taking part in a half-term skills development camp on February 14, 2017 in Stamford, England. The Duchess of Cambridge is Royal Patron and Honorary Air Commandant of the Air Cadet Organisation. (Photo by Max Mumby/Indigo/Getty Images)