Earl Spencer has “undoubtedly” formed an alliance with the Duke and Duchess of Sussex to undermine the King, according to royal author Tom Bower.
He told GB News: “He’s not only selling a book, but he’s also undoubtedly formed an alliance with Harry and with the Duchess to somehow damage the King.
“Arguments between aristocrats have been going on for 1,000 years in British history, they normally end with an execution. I am sure the king tonight will think if only I could cut off his head. But I think it’s more serious for the King than we can imagine.
“When I wrote my book about Charles, Rebel Prince, I had impeccable sources in Balmoral and all sorts of things, and I called some of them today, and all of them united in saying that Charles was in real grief.
“The idea that he would even say ‘rest assured’ that bit – but the idea was giddily elated, is complete rubbish. The man was absolutely smitten. He was horrified. He was frozen.
“So I think it’s rather sad that Charles Spencer, who I had great regard for as a historian, should be doing this. But then Prince Harry did the same with his biography. I think it’s money troubles, personal troubles. He’s been in therapy. He’s not feeling very well.
“And you’ve got to remember, it’s the same publisher that did Harry’s book, and they want juice for all the money they’ve given him. They want headlines, which they’ve got.
“But I think it’s more serious than that. I said here, I think like two weeks ago when I was here, that the return of Harry and Meghan is heading towards a crisis. They haven’t declared why they’re here. They haven’t declared what they’re how long they’ll stay.
“Their object is not only to ingratiate themselves with the Royal Family, but cause trouble. And there’s no doubt that Harry knew that his that Spencer was going to bring out this book. It was a pincer movement.”
Asked if Harry would really want to damage his father, Bower said: “Oh yes. I mean, well, he’s motivated, of course, by Meghan, the most disloyal person there is in the world.
“No, they’re desperate to re-enter Britain on their terms, and their terms are non-negotiable. They must be allowed to have a convoy of protection and all the rest to be back in the royal duties.”
He added: “It is destabilising. First of all, it goes all around the world. This book will be read in every country, and just like Meghan’s interview with Oprah Winfrey or the Netflix series, or Harry’s book, it all damages not only Britain but the reputation of the Royal Family, which is intrinsic to Britain.
“So the damage is global, and I don’t think people will want to pick up the truth. They like the headline, and the trouble is that undoubtedly towards the end of the week or the weekend, Charles Spencer will give an interview.
“He’s very plausible, and he wants to damage Charles because, for one reason or another, they’ve never got on.
“And you’ve got to remember one other thing about Charles Spencer: in that summer of ’97, when Diana was in London, was very hot, didn’t know what to do with her two sons. She asked her brother, ‘Can I spend a week on your estate at Althorp?’ And he said no because the paparazzi will get in the way. So she goes off with al-Fayed.
“As Paul Burrell, the valet, said to me, ‘Funny about Charles Spencer. In her lifetime, he wouldn’t have her in his house, but when she’s dead, he charges £10 a visit’.”
On the fallout from the book, he said: “The King gets damaged, and we’ve still got the problem of Harry and Meghan. What are they [doing]? All the trouble they’re going to cause. We’ve got the Andrew problem too. We get that.
“The monarchy is in some sort of crisis, and it’s going to get worse. And I think it’s rather good that the King has now got a good adviser in the Lord Chamberlain next to him.
“He’s going to need more advisers, and he’s going to have to react faster than he’s been used to in the past, and be more confrontational and he’s got to stand up for the monarchy and stand up for Britain.”