Sarah Bradford is in very high standing as a writer. I have seen her being interveiwed on BBC regarding the Royal family, and she is one of the few writers I believe does not sensationalise the subject of her books. Everything she said made sense, was credible, factual, and I do not think that the BBC would embarrass itself by unleashing someone on national television who writes trashy novels about their Royal Family.
( UNLIKE KITTY KELLY)
I have read Paul Burrell's books, and it is very obvious that he was very much in love with her. But I dont think he embelished anything, also one must remember that the Queen stood up for him, resulting in the end of the legal proceedings he was embroiled in. If the Queen takes the trouble to save your bacon....well.
He also wrote those books about Royal entertaining, flowers and table setting etc. Hmmmmmmm. !