Unlawful killing, the documentary by Keith Allen on the death of Princess Diana caused outrage in Britain as never-before seen footage of the accident was released on May 13 at the 2011 Cannes festival.

The movie alleges that elements within the British establishment have worked to cover up the actual details of the 1997 car accident that killed Diana along with her companion Dodi Fayed. The documentary has been funded by Dodi's father, Mohamed Abdel Moneim Al-Fayed, who is an Egyptian businessman.

Throughout the years, Al-Fayed has maintained that his son and Diana were killed by the British secret service at the behest of an establishment horrified by her romance with a Muslim man.

Unlawful Killing is not about a conspiracy before the crash, but a provable conspiracy after the crash. A conspiracy organised not by a single scheming arch-fiend, but collectively by the British establishment - judges, lawyers, politicians, police chiefs, secret services, even newspaper editors - all of whom have been appointed to their positions because they are 'a safe pair of hands', Allen writes in the Guardian.

Allen also stated that the movie is not against the monarchy but is questioning the basis of capitalism.