William, Prince of Wales, and Harry, Duke of Sussex, once shared an inseparable bond after the 1997 death of their mother, Diana, Princess of Wales. But now, even with the recent cancer diagnosis of their father, King Charles III, the brothers cannot stand the thought of even being near one another. “It was out of the question for him to see William, who had two royal duties the next day and was helping his recuperating wife as well as his children,” royal commentator Richard Fitzwilliams, exclusively tells The Royal Observer in the wake of Harry’s impromptu visit to Britain on February 6. “Th…