Prince William and Catherine, Princess of Wales, are obviously the future of the British monarchy as the heir and his consort, but the pair are also dedicated to helping a cancer-stricken King Charles III. This is despite the future queen also battling the same disease. “William and hopefully Catherine will undoubtedly stand in for King Charles if he is unable to attend CHOGM (Commonwealth Heads of Government Meeting) in Samoa in October, and a tour of the Antipodes would normally follow. We Will see,” veteran royal and entertainment expert Richard Fitzwilliams exclusively tells The Royal Obse…