'She had quite a severe head injury but was still very much alive on the back seat,' the royal added.
The princes opened up in a BBC documentary to be screened.
Royal speaks to Mark Austin in Channel 4 documentary Wasting Away: The Truth About Anorexia.
Body language expert Judi James breaks down three key interviews in the relationship.
Retired lawyer Stanlee Culbreath breaks his silence after 20 years.
Michael Gibbins said their relationship was only for the summer.
The people on the People's Princess.
Princess Diana touched the hands of HIV positive patients in public at the height of the epidemic, in the 1980s.
US actress is famed for her slender physique.
Those three words left Di 'shattered', according to a report by her friend Richard Kay.
Earlier in August, the prince said he did not want to be buried next to his wife because she hadn't made him king.
Diana And Dodi: The Truth was due to be published on 31st August 2017.
Reflecting on some of Diana's relationships ahead of the 20th anniversary of her death on 31 August.
But are selfies allowed?
Dennis Muhammad Abdullah and Princess Tunku Tun Aminah met three years ago at a cafe.
Nothing has been confirmed by Clarence House regarding Queen's alleged abdication plans.
Could this be why Prince Harry is head over heels?
Ant McPartlin has described his recovery from addiction to painkillers and alcohol.
Controversial article published on PinkNews after future king posed with his hands on his face.
New book, Guarding Diana: Protect The Princess Around The World, says vibrator was bought as a joke.
Countess Spencer wasn't popular with her world famous stepdaughter.
Diana felt boosted when the tapes were leaked, according to a new book by her protection officer.
Her former butler Paul Burrell made the claims in a film to be shown on Channel 4.
Royal insider Richard Fitzwilliams recalls business mogul's "shambolic" evidence at inquest.
Diana's legacy extended to the pariah hermit kingdom.
British Royal Family warned not to consume particular food to avoid illness abroad.
Late Diana, Princess of Wales' butler says that Kate doesn't possess that 'extra something'
First editions of the purple teddy are on the market for big sums of money.
The royal is said to have made the three-week holiday "incredibly romantic".
A grand piano, cuddly toys and a wall covered in photos of William and Harry can be seen.