The Princess of Wales dazzled in a glittering tiara tonight as she attended her first state banquet in almost two years with a whole host of famous faces. Kate wore the Lover's Knot tiara and red gown with caped back detailing by Sarah Burton for Givenchy as she joined the King , Queen, her husband Prince William and some 160 guests at Windsor Castle for the white tie dinner, which is the glitzy highlight of the French state visit. French president Emmanuel Macron and his wife Brigitte are