Prince Charles did not initially want to admit his affair with Camilla Parker-Bowles in a television interview. However, a new documentary revealed that he made a second recording of the said conversation, where he confessed to adultery.

Channel 4's upcoming show, Diana: The Truth Behind the Interview, explored what went on in the early 1990s following the breakdown of the royal marriage between Prince Charles and Princess Diana. Produced by Sir Max Hastings, the documentary unearthed the second interview of the Prince of Wales with Jonathan Dimbleby.

Apparently, someone was able to convince Prince Charles to tell the public that he has been seeing someone else while married to Princess Diana. Hastings said that the royal was informed he would gain more sympathy if he admitted to straying in his marriage since the news was going to come out eventually.

This explained why Prince Charles first had his interview with Dimbleby in Windsor Castle. He did the second interview, with the confession about Camilla, in Highgrove.

But, after the Prince of Wales revealed that his marriage to Princess Diana had "broken down irrevocably," his wife retaliated with a more explosive interview with Martin Bashir of Panorama on BBC. This led to Queen Elizabeth ordering her son to start the divorce process since it was pretty clear they will not be able to fix their marriage. Diana's Panorama interview also soiled the show's relationship with the royal family.

But, according to royal correspondent Ingrid Seward, Princess Diana only regretted parts of that talk with Bashir because she also confessed her affair with James Hewitt. Her sons, Prince William and Prince Harry, found out that she was also unfaithful to their father. However, Princess Diana was generally glad the show made her open up about her struggles with bulimia, which was the direct result of her failing marriage.

Diana: The Truth Behind the Interview also learned that Princess Diana's handwritten note, which indicated that she agreed to the interview with the BBC and was not forced to confess anything, has disappeared. Records, reportedly, showed that the network lost the physical copy of the royal's note but its existence was documented in their files.

It comes amid allegations that Bashir faked some documents to convince Diana and her brother, Charles Spencer, to speak to him on television to refute Prince Charles. Patrick Jephson, Princess Diana's former private secretary, also said that he was personally outraged by the interview so he resigned from his post.