Princess Diana and her lover Dodi al-Fayed were unlawfully killed by the grossly negligent driving of chauffeur Henri Paul and paparazzi photographers pursuing their limousine into a Paris road tunnel in August 1997, the jury at her inquest concluded today.
The jury, which had spent almost six months listening to more than 250 witnesses from around the world, reached their majority decision on Monday after deliberating for four days.
Chauffeur Henri Paul was found to be over the legal alcohol limit
It was delayed for 10 years because Britain had to wait for the French legal process and then a British police investigation to run their course before it could begin.
Both police inquiries concluded the fatal crash was a tragic accident caused by the chauffeur being drunk and driving too fast.
Under British law, an inquest is needed to determine the cause of death when someone dies unnaturally.
A decade after the death of the world's most photographed woman at 36, former police chief John Stevens said he hoped this would finally bring closure to the tragedy and lay to rest conspiracy theories swirling around the case.
On the evening they died, Diana and Dodi fled from the back entrance of the Ritz Hotel in Paris in a desperate bid to avoid swarms of paparazzi photographers snapping their every move.
They pursued the ill-fated couple on high-powered motorbikes into the Alma tunnel and took pictures of the dying princess in the wrecked Mercedes after it smashed into pillar 13.
Dodi's father, Harrods-owner Mohamed al-Fayed, had accused Prince Philip of ordering MI6 to kill her and stop her marrying a Muslim and having his baby.
In a statement after the judgment, al-Fayed said: "I'm not the only person who said they were murdered. Diana predicted that she would be murdered and how it would happen. So I am disappointed."
He insisted that the Queen and Prince Philip should have been called as witnesses. "No one should be above the law."
"I have always believed that Prince Philip and the Queen hold valuable evidence that only they know."
Henri Paul, the chauffeur, was an employee of the Ritz Hotel, owned by Fayed.
The jury foreman said in court: "The crash was caused, or contributed to, by the speed and manner of the driver of the Mercedes and the speed and manner of the following vehicles."
The foreman said contributing factors were: the fact Paul's judgment was impaired by alcohol, Diana was not wearing a seat belt and that the car hit a pillar.
"I do hope everyone will take this verdict as closure," said John Stevens, who led the British police probe into the deaths.
The presiding judge, Lord Justice Scott Baker, had specifically instructed the inquest jury to reject conspiracy theories that it was a staged accident.
Ken Wharfe, Diana's former bodyguard, told the BBC: "I was surprised. Like a lot of people, I was expecting a verdict of accidental death."
Diana's sister Sarah left the court afterwards without saying anything to waiting reporters.
The inquest, estimated to have cost up to $20 million, stretched around the globe with witnesses heard by video link from France, the United States, Nigeria, Kenya and Australia.
Few details of Diana's private life were spared as friends, family, faith healers, spies, bodyguards, police chiefs and butlers were called to give their opinion at an inquest that sparked worldwide media interest.
Both police inquiries concluded the crash was a tragic accident caused by Paul being drunk and driving too fast. Paul was employed by al-Fayed at his Ritz Hotel.
Under law, an inquest to determine the cause of death is required when someone dies unnaturally.