King Charles 'in Full Damage Control Mode' Over Earl Spencer's Diana Claims

King Charles is reportedly in "full damage-control mode" after the recent claims about Princess Diana.

This comes after Buckingham Palace surprisingly and publicly challenged Earl Spencer's explosive claim that the monarch said Diana would soon be "forgotten" after her death.

Ahead of the publication of Earl's memoir, Swan Song: Diana, My Sister, Charles has reportedly become embroiled in a deeply personal dispute with his ex-wife's brother.

In his memoir, Earl alleged the then-Prince Charles had made the remark that Diana would soon be forgotten.

This allegedly happened during an angry telephone conversation over whether Prince William, then 15, and Prince Harry, then 12, should walk behind their mother's coffin at her September 1997 funeral.

Apparently, Earl claimed that Charles called after learning that he opposed William and Harry joining Diana's funeral procession.

He wrote: "Prince Charles continued his stream of anger without me interrupting. Then he stopped. I assumed the pause signalled an effort to bring himself under control."

"But then he unleashed down the phone what I have always taken to be his pent-up contempt for Diana, and his horror that the world was so bowled over by her death. 'Rest assured,' he hissed, 'we'll forget her soon enough!'" Earl continued.

Earl said he replied, "I can't believe you just said that," before ending the call.

As a royal source recently claimed to Radar Online, "The Palace is acutely aware of how damaging an allegation of this nature can be because Diana remains such an important figure to millions of people."

"There was a feeling that allowing such a serious claim to circulate completely unanswered would risk it becoming accepted as fact. The response reflects just how seriously this is being taken, and Charles is now in full damage control mode," the source continued.

Following that, Buckingham Palace made the highly unusual decision to respond directly to Diana's brother's claims.

A spokesman said to the outlet: "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."

Meanwhile, another insider claimed: "This is not an intervention the Palace would make lightly. There is no desire to become involved in a prolonged public argument with Diana's brother, but equally there was determination to challenge his version of such an intensely emotional conversation."