Princess Diana's regret for bombshell BBC interview laid bare

Princess Diana believed that her Panorama interview with the BBC was a massive "mistake" after the former Princess of Wales was heavily warned against voicing her personal life, including King Charles' infidelity, in the interview with Martin Bashir.

Royal expert Nick Bullen told Royally Us: "I know one newspaper editor who was having lunch with her on the day that she did the interview.

"He was having lunch in Kensington Palace with her and the cameras were being set up upstairs."

Quoting the late Princess of Wales, he added: "Diana said to him 'I'm thinking about doing this thing', not knowing it was happening that night.

"The editor said do not under any circumstances, you should not do this.

"So, even on the day [Diana] was being told not do it," noted Bullen.

Speaking about regret in the aftermath of the interview, the expert noted: "I think in the initial days after she really felt she'd put her voice out there.

"She also believed what [Martin] Bashir told her about the security services listening to her.

"[However] I think as more clarity set in, it became more and more apparent [that] it was a huge mistake," he concluded.