I agree, several biographers have claimed he was devastated, also, selfishly, worried he would be blamed for her death. I think Charles Spencer is so far off the mark is trying to present and image of King Charles’s as being as ‘excited as a lottery winner’,,how sick is he to write that.
"He was absolutely distraught. He fell apart," Tina Brown, who wrote The Diana Chronicles, said Diana: 7 Days That Shook the Windsors. "He knew, instantly, that this was going to be a terrible thing, that...he will be blamed, that they will be blamed, for the death of Diana."
In King: The Life of Charles III, Christopher Andersen says Charles was "ashen and trembling" when he heard the news of Diana's death. "He let out a cry of pain that was so spontaneous and came from the heart. Palace staff rushed over to Charles’ room and found him collapsed in an armchair, weeping uncontrollably."