A white Fiat Uno is a missing piece of the puzzle in the crash that killed Diana, her companion Dodi Fayed and driver Henri Paul on Aug. 31, 1997. Police concluded that their Mercedes had collided with a white Fiat Uno, but never found the car.

Georges and Sabine Dauzonne, testifying by videolink from Paris at a coroner's inquest in London, said they thought at the time that the driver of the slow-moving, weaving car was drunk. As they overtook the Fiat, they noticed that the driver was looking intently in his interior and left-side mirrors.

"When we heard of Diana's death, we thought he was most likely looking in his mirrors to see what had happened in the tunnel," Mrs. Dauzonne said.

The couple's Rolls Royce did not travel to the westbound lanes of the tunnel, where Diana's car crashed, but joined the expressway further on, where they encountered the Fiat.

Dauzonne said he was going about 30 kph when he first noticed the Fiat, which was traveling even slower. He and his wife both described the car as weaving first to the right toward their approaching car, then to the left, then back to the right.
Darmon's testimony came days after another motorist, who also witnessed the car crash had claimed that he saw a "major white flash" moments before the tragedy.

Francois Levistre, who was driving in front of Diana's Mercedes through the Alma tunnel, had told the inquest that he saw a motorbike overtaking the car moments before it crashed into a concrete pillar.

"I realised there was this major white flash of the motorbike in front of the Mercedes, in front of the car," he had said.

Dodi's father Mohammed Al-Fayed had already alleged at the inquest that the couple were murdered by British secret service on the orders of Prince Philip.

"MI6 agents had blinded the Mercedes' driver with a flash gun and it was part of the conspiracy to make the crash look like an accident," the Harrods boss had claimed.