The letters state: “I can only repeat what I have said before.
“If invited I will always do my utmost to help you and Charles to the best of my ability but I am quite ready to concede that I have no talent as a marriage counsellor.
“We don’t approve of either of you having affairs.
“Charles was silly to risk everything for Camilla for a man of his position.”
Princess Diana's private secretary between 1989 and 1996 said, "Here at last was written proof that it was acknowledge, recognised, and it was sympathy for her."
Historian Sarah Gristwood said of the stunning letters: “Never mind how Camilla might felt about that he was being supportive towards Diana and no one knew better than Prince Philip just how hard it was for an outsider to come into the Royal Family.”