She was the most famous and most photographed woman in the world when she was killed in a car wreck in Paris that made headlines around the world.

In any other country but super-secretive Britain that crash, with its attendant mysteries of vanishing cars, bright white lights and pursuing motorcycles would have sparked a wave of conspiracy theories to surpass anything that sprang up about Marilyn, JFK and 9/11.

But there was silence.

Anywhere else in the world the disappearance of eyewitnesses, the blatant mismanagement of the pathological samples from all three victims, the rapid cleansing of the crash site and the swift removal and destruction of evidence - any one of those would have created a media firestorm.

But there was none.

Long, continuous pressure, particularly from the grieving father of Dodi Fayed, eventually led to a reluctant and much-delayed enquiry which failed to call most of the vital witnesses, failed to address any of the outstanding questions and said in advance it would allow Britain's security services to sidestep any subjects they didn't wish to discuss. Seriously.

Unsurprisingly, that enquiry found no evidence of foul play, or a cover-up.

But those who were in Paris and saw the city awash with MI6 staff who'd curiously arrived before the crash, and who later saw all their stories spiked- they all knew it was more than a car accident. And some of us knew that taking command of a target vehicle by radio-control and crashing it hard enough to kill the occupants was a method of execution already used with great success by the SAS. So we were the ones who watched most carefully, listened the hardest and found the missing witnesses. But none of us was able to publish a simple truth:

The mother of a future King of England died in a crash that was engineered. The evidence which might have confirmed that, and revealed the reasons and thereby the perpetrators, was deliberately destroyed or ignored, and the cover-up had begun before the shattered Mercedes was pulled out of the Alma tunnel.

It continued with the murder of my father, among others, and I only escaped with my life as long as I have because I was one of the MI6 operatives in Paris.