King Charles is believed to have decided to counter every claim in Earl Charles Spencer's new Princess Diana memoir.
The bombshell memoir, Swan Song: Diana, My Sister is ready to hit the shelves today, September 22, 2026, and Palace sources have already lift the curtain on Charles' combat strategy.
As the scathing tell-all contains shocking claims against Charles - who was Prince of Wales at the time of his marriage with Lady Diana, insiders are claiming that the 77-year-old monarch will "keep fighting" against Earl Spencer's narrative.
An insider exclusively told Woman's Day magazine that "enraged" Charles is prepared to "keep fighting" against Spencer’s narrative, despite the fear that it will end up being in a "lose-lose scenario".
Referring to Buckingham Palace's official statement addressing first bombshell claim Earl Spencer made about Diana's death, the insider noted, "The fact that he (King Charles) made a statement shows just how enraged he is."
“Everyone told him not to dignify this with a response but that just wasn’t an option, he had to speak out," they added.
Buckingham Palace's first official statement on Earl Spencer's post Princess Diana death claim against King Charles
As per the excerpts from Prince William and Harry's uncle's new book, during a telephonic exchange after Diana's death, King Charles told Earl Spencer that his sister will be forgotten "soon enough".
Reacting to this claim, a spokesperson on behalf of Palace issued a statement which read, "While we do not comment on books as a matter of principle, His Majesty is mindful that the pain of fraternal grief can cloud reason, affect judgment and colour memory in ways others do not recognise, even many years after such a loss."
