Buckingham Palace has released an unprecedented statement after Earl Spencer made claims about King Charles's behavior during one of the most difficult periods of their lives. In his new book, Swan Song, Earl Spencer details the aftermath of the death of Diana, Princess of Wales. He recounts a telephone call with Charles in early September 1997, during which he claims the man who is now king became angry and blurted out that "Diana will soon be forgotten."

The claim emerged as the book was serialized in the Daily Mail before its publication on September 22. Almost immediately after the serialization, Buckingham Palace took the rare step of responding to a book's claim. In a statement, the Palace said, "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 judgement and colour memory in ways others do not recognise, even many years after such a loss." This extraordinary comment was widely interpreted as an immediate and forceful rebuttal to the book's assertion. Earl Spencer did not offer an immediate reply.

The book had already garnered headlines after four copies were reported stolen from a lorry transporting thousands of editions from a publishing plant in central Europe. The four copies, each wrapped in black plastic to maintain secrecy, were taken from the lorry while its driver slept, parked in the countryside in the Netherlands. Dutch police are currently investigating the incident. Earl Spencer's book reflects on the final years of his sister, Diana, Princess of Wales, and he states it is another attempt to tell her story from her own perspective.

The Earl previously caused global shockwaves with his eulogy at Diana’s funeral, where he spoke of her being hunted and vowed to care for her two children. His words were met with immediate applause both inside and outside Westminster Abbey. This marks the second time in a week that King Charles has surprised with the forthright nature of his responses to situations. Just days prior, the Lord Chamberlain sent a letter to all those involved in organizing royal engagements, stating that the Duke and Duchess of Sussex remain private citizens and do not represent the Royal Family. He also added that their HRHs were in abeyance and that the terms of the Sandringham agreement remain in place. This letter was sent after Buckingham Palace received several inquiries.