Kate Middleton issued a subtle warning to her husband, Prince William on Coronation Day - and her concerns were entirely relatable.The Prince and Princess of Wales, both 40, were dressed in their full regalia for the event, which was watched around the globe and saw King Charles III and Queen Camilla officially become monarchs of Great Britain. Prince William, heir to the throne, wore his Order of the Garter mantle, whilst Kate wore her Royal Victorian Order mantle, both of which featured long floor-length robes - which would certainly be easy for one to trip over.