Britain's Prince William, Duke of Cambridge (L) stands next to his wife Britain's Kate, Duchess of Cambridge (R) at the Invalides during a visit to France, on March 18, 2017 in Paris.
Britain's Prince William pledged on the eve that his country will retain close links with France despite Brexit, as he and his wife Kate began a two-day visit to Paris. / AFP PHOTO / GEOFFROY VAN DER HASSELT        (Photo credit should read GEOFFROY VAN DER HASSELT/AFP/Getty Images)