King Charles' "Deepest Regret" Revealed By Biographer

The monarch is haunted by the moment when he asked his sons Prince William and Prince Harry to walk behind their mother's coffin.

A royal biographer has revealed King Charles III's "deepest regret". According to author Christopher Andersen, the monarch is haunted by the moment when he asked his sons Prince William and Prince Harry to walk behind their mother's coffin, Us Weekly reported.

"I think it haunts him because it haunts them, and they've spoken about it," Christopher Andersen told the outlet while speaking about his upcoming biography, 'The King: The Life of Charles III'. 

He added, "I've written that I believe it's a form of PTSD." 

Mr Anderson also said that Prince Harry, Duke of Sussex, has a nightmare of flying to London. The author continued "[He said] it reminds him of that day when he had to walk behind the coffin, and they were more or less bullied into doing it by the palace - by the men in gray who really run the palace, the people that Diana used to complain about."