A royal expert has made a series of claims about the British Royal Family in his new book all about Princess Diana’s infamous BBC interview.

Andy Webb’s book, titled Dianarama, comes a whole three decades after the broadcast of the Panorama interview, which saw the late Princess of Wales reveal there were ‘three of us’ in her marriage with the then Prince Charles, who is now the King.

In the interview, Diana candidly addressed Charles’ relationship with Camilla Parker Bowles, who is now the Queen Consort, with her honesty changing how the world saw the royal family forever.

One claim of Webb’s in particular sees the expert allege that the eldest of Diana’s two sons, Prince William, still ‘wants to know the truth’ about his mother, who tragically died aged just 36 following a high-speed car crash in the Pont de l’Alma tunnel in Paris on the 31st August 1997.

Now, the Panorama interview was conducted by BBC journalist Martin Bashir and, according to Webb’s book, William is ‘taking steps to discover’ the truth of how the Panorama interview came to be.

The book revisits how Bashir secured the interview by showing Earl Spencer faked bank statements and feeding him a string of lurid claims about people around Diana, namely suggesting such individuals were being paid by the security service MI5.

Those tactics set off the chain of events that led Diana to speak to Panorama in 1995.

William said that BBC managers ‘looked the other way, rather than asking tough questions’, believing that the interview deepened the strain on his parents and added to Diana’s ‘fear, paranoia and isolation’.

An unnamed source describes the soon-to-be King as an ‘implacable antagonist’ who ‘has people on the case’, something which suggests William is still pressing quietly for a full account of how Bashir operated and why the corporation, which was criticised for failing to challenge his methods and for giving misleading reassurances about what had happened, failed to stop him.

The official cause of death for Diana was determined to be a combination of the driver being under the influence of alcohol and speeding, which led to the car losing control while being pursued by paparazzi.

Diana, her partner Dodi Fayed, bodyguard Trevor Rees-Jones and driver Henri Paul were in the Mercedes on the night of the crash. While Paul and Fayed died at the scene, the beloved activist was critically injured and taken to the hospital, where she died from her injuries.