Another shocking claim found in the cameraman's diary is that Diana stated she'd do anything in her power to keep Charles from becoming king. Charles knew about it and didn't care.
Diana is reported to have described their conversation as "phone sex talk". Channel 4 has defended the use of the clips, calling them part of an important historical document, but the late princess's family and friends have voiced strong objections.
"She makes it clear that she would do everything possible to make sure Charles never became king", the cameraman wrote. She said she was "happy to give all this up" and leave the Royal Family to be in a relationship with him.
The cameraman allegedly had noted of her oldest son, "She wanted William to succeed to the throne when the Queen died".
During the frank recordings, Princess Diana revealed she had only met Charles 13 times before their wedding day but on their second meeting he chatted her up "like a bad rash".
The cameraman, believed to now be living in the United States, says he was paid £5,000 ($6,500) for his work and was put in touch with Diana by documentary maker Desmond Wilcox. She had this somewhat romantic idea of being a king-maker, the mother behind the monarch, ' the cameraman added.
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The tapes were reportedly recorded while Diana was preparing for her now infamous Panorama interview with Martin Bashir in 2005, where she candidly opened up about Charles' affair with Camilla.
A controversial new documentary about Princess Diana will be aired on Channel 4 tomorrow night despite calls for it to be scrapped. He was given an evidence log with thousands of things on it and there were these audio tapes and some video tapes.
Some of the tapes are still missing and it is thought they may have been destroyed - along with the BBC man's tapes that detail today's "phone sex claims".
"Peter has always wondered what on earth has happened to the rest of the recordings".
According to reports, Diana also claims that the Queen refused to help her, and that Prince Philip gave Charles permission to cheat.