Princess Diana feared dying in a car crash - but a note detailing her concerns was not immediately passed on to French authorities investigating her death.
Diana told her lawyer Lord Mishcon that she believed she would be a target of “some accident in her car, such as a pre-prepared brake failure” in October 1995 - two years before she died in a Paris car crash along with boyfriend Dodi Fayed and driver Henri Paul.
Lord Mishcon handed his contemporaneous typed account of the meeting to Metropolitan Police officers but it was six years before the note was handed over by Scotland Yard chiefs.
The eerie note is revisited in the Channel 4 documentary Investigating Diana: Death In Paris, which began with the first of four parts on Saturday night to mark 25 years since the tragedy.
The Daily Mail reports that Diana's siblings only learned of the note's existence a decade after her death, while her sons Princes William and Harry were also unaware of it for years.
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Lord Mishcon had read the note aloud in a meeting with police chiefs a month after Diana's death, telling officers Diana had said that “efforts would be made if not to get rid of her by some accident in her car, such as a pre-prepared brake failure… at least to see that she was so injured or damaged as to be declared unbalanced [in her mind]”.
Lawyer Michael Mansfield, who represented Dodi's father Mohamed Al Fayed, said during Saturday's programme: “The note is important because it's equivalent to somebody's premonition.
“If you were a police officer investigating it, you want to hand the account over to the French. They didn't do that. They stick it in the safe and they don't reveal it.”
There is speculation that Prince Harry's memoir, due for release later this year, could reference the Mishcon Note, with the documentary claiming key details were kept from the Duke of Sussex and his brother for a decade.
An investigation into conspiracy theories surrounding Diana's death called Operation Paget was led by former Met commissioner Lord Stevens in 2006 and he briefed William and Harry ay Kensington Palace to detail the report's findings.
Lord Stevens says that until that point, the princes had “limited knowledge” of the events surrounding their mother's death.
“I was in possession of the facts of what had taken place, from the beginning of the problem outside the Ritz with the car, to the death and bringing back the body,” he said.
“They wanted to know the circumstances of the death, what had happened to their mother, in every aspect.
"Some questions were in detail – which I answered, because they hadn't been told of the circumstances.”
The operation found “no evidence” of a murder conspiracy or MI6 cover-up and blamed Diana's death on drunken driver Henri Paul.
READ MORE: Former policeman had to probe 104 conspiracy theories about Princess Diana's death
