Princess Diana promised she will have Prince William succeed Queen Elizabeth II

Princess Diana was in favour of making Prince William the next monarch, not Charles.

The former Princess of Wales, who reportedly had a 'highly combustible' marriage with His Majesty, had royal staff terrified of their fights.

Christopher Anderson in his book quotes an incident when Charles demanded due 'respect' from Diana.

“‘Do you know who I am?’ he demanded of his wife.

“Diana answered that he was a ‘f–king animal,'” writes Andersen. “You will never be King!” she shouted. “William will succeed your mother. I will see to that.”

Charles and Diana's marriage eventually ended in 1996.