Richard Kay has come out and confirmed CS view. Here is part of the article which is on Mail+
https://www.dailymail.com/news/royals/article-16142015/RICHARD-KAY-Earl-Spencer-Diana-death-row-Charles-memoir-book.html
He and I spoke several times during that frightful week between Diana’s death and her funeral. He wanted to know about Dodi Fayed, who died with her in the crash. What kind of man was he, he asked? Was he good to her and did I think she loved him?
I couldn’t answer about love, though I did say that as this was the only relationship since her marriage to be acknowledged it must mean something. He asked if they might have married. I told him that I thought they really might. Wisely Spencer was doubtful and left Dodi out of his oration (I, too, later concluded Diana would not have married him).
I said Dodi and I had spoken a couple of times the previous week when the two were still away on their last Mediterranean cruise. He rang me on Diana’s mobile phone calling me ‘Ricardo’, the nickname she had given me so people overhearing wouldn’t know who she was speaking to.
I recall telling Spencer that he seemed straightforward, easy-going and uncomplicated, and that appealed to Diana.
He told me about the thousands of letters that had come by the sackload from all over the world. Then, pointedly and without further explanation, he said everyone he had been dealing with over the funeral – courtiers, officials, Downing Street – had been helpful, with one exception.
Who, I asked? ‘Prince Charles,’ came the reply.
He said they’d had a ‘furious row’. It was ‘about the boys’, but he was reluctant to go further. Cuttingly he added: ‘He has been utterly pathetic.’
We touched on the events since the tragedy a few days earlier. The atmosphere on London’s streets, packed with mourning bystanders wanting to pay their respects, was febrile.
There was anger at the perceived coldness of the royals sequestered on their Scottish estate.
Much of it was directed at Prince Charles. Spencer told me he found the royal's wish to walk behind his ex-wife’s coffin weird, and it alarmed both courtiers and the police. There was talk that the crowd might shout abuse at the prince or even hurl objects.
Amid the drama of that week – at one stage the prince was reported to have told his family, when they questioned why he proposed to bring Diana’s body home in a royal flight, ‘Would you rather it was a Harrods van?’ – the prince was viewed as both villain and victim.
Looking back through notes I made at that time, family members initially told me they hoped the funeral would be a small one. Someone had gone through Diana’s address book at Kensington Palace. There were only 40 or so names in it. But as she once told me, they were the people ‘she really loved'.
It was the extraordinary scenes of thousands lining the route from RAF Northolt, where Diana’s coffin had been flown to from Paris, into central London that changed everything.
Charles Spencer’s oration, in which he made his famous pledge to ensure that Diana’s ‘blood family’ would do all it could to ensure William and Harry were ‘not simply immersed by duty and tradition, but can sing openly’, as his sister planned, was the last act of the Spencer/Windsor wars.
But Harry, who has sought desperately to cloak himself in his mother’s legacy as an outsider and disruptor, has revived the conflict. He feels he has been undermined and traduced by the Royal Family, just as his mother felt.
Harry’s return to these shores, demanding an apology for the way he feels he and Meghan were treated before they fled to California, is something of a replay, particularly in the way he has intensified those Spencer blood ties.
Diana always used to tell me how thrilled she was to be a Spencer. When she lost her HRH title on divorce, although hurt, she remained upbeat. ‘I shall always have a title, the one I got from my own family,’ she told me. This was Lady Diana Spencer, or Lady Di, as she was universally known.
Poignantly, Spencer reveals how, hours after his funeral address, the Queen – whose face, rigidly composed, did not flicker a sign of emotion as he spoke a few feet from her that September day in 1997 – offered, incredibly, to restore her Royal Highness style.
Was this the Queen, so outwardly impassive and reserved, finally acknowledging the mega-watt star power of the princess? Or was it her way of accepting that the royals had treated Diana shoddily?
Of his remarks she offered no criticism, telling Robert Fellowes that as Spencer – her own godson – was speaking as Diana’s brother, he was entitled to say whatever he felt fit.
For his part, Spencer viewed the HRH gesture as well-meaning but hollow and turned it down. Despite her bravado, I knew Diana felt its removal deeply and believed it had been done out of spite.
One consequence, the book relates, was an encounter with Princess Michael of Kent, her neighbour at Kensington Palace whom she despised. The imperious Marie-Christine told her: ‘Don’t worry Diana – you only need to curtsy to me when we are in public!’
Harry, whose wife was said to bridle at having to curtsy to Kate, would surely identify with his mother’s dismay as he embraces his Spencer heritage.
In his California absence, the admiration and respect for the other figure in this saga, Prince William, has deepened and blossomed. However much Harry may hate it, William and Kate are the true inheritors of Diana’s popularity and of her sense of duty.
As her little brother, Charles Spencer sees his duty is to correct some of the many calumnies Diana’s fame brought on his family. Among them that her childhood was unhappy. Despite the sadness of their parents’ divorce, he writes of their blissful early years in Park House on the Sandringham estate, so much homelier than Althorp where they moved when Diana was a teenager.
A young Charles Spencer looks adoringly at his big sister Diana in 1967
And he vehemently defends his father over claims he was an abusive husband who struck his wife. Untrue, says Spencer.
In challenging the narrative of his sister’s early life he risks putting himself at odds with Diana’s own version of events. That came in her collaboration with Andrew Morton in Diana: Her True Story – and the author has the princess on tape.
On the royal marriage, Spencer captures both its bleak aridness but also its intimacy. Diana’s account to her brother of learning how her husband was bullied as a child by his father is deeply affecting. (She always insisted to me that there were times when the two were properly ‘in love’.)
Above all, his book tries to reveal the Diana he knew, a vibrant beauty but often troubled. He offers a diagnosis – ADHD – and suggests that as part of that condition she suffered from Rejection Sensitive Dysphoria (as does he). This, he says, ‘is an intense emotional pain in the face of others’ rejection or criticism’.
It is heartbreakingly sad to read these words and how, as he claims, Diana drove herself on more than one occasion to Beachy Head, the towering East Sussex cliff, and contemplated ending it all. ‘Her love for her sons stopped her going further.’
Back in 2002 Charles Spencer gave an interview in which he said it was time to draw a line under ‘being the man who made a speech at his sister’s funeral’.
Almost 25 years later, with a sensational and controversial flourish, he finally has.
Earlier I suggested this was the history Spencer always wanted to write. I believe it’s also the book Diana would have wanted him to write.