PARIS, FRANCE - MARCH 18:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit the Eiffel tower for a 'Les Voisins in Action' event highlighting the strong ties between the young people of France and the UK during an official two-day visit to Paris on March 18, 2017 in Paris, France. Their Royal Highnesses met local school children and students from the British Council's Somme project and young learners programmes, as well as young French rugby fans ahead of the RBS Six Nations match that afternoon. (Photo by Arthur Edwards-Pool/Getty Images)