Photos courtesy of the Daily Mail
The usual suspects cited by conspiracy theorists include the royal family -- because they were unhappy Diana was to marry her lover, Muslim Dodi al-Fayed -- or arms dealers, because they were angry at her support for a ban on landmines.
"They were killed as a result of a wicked conspiracy by people who did not want the princess to marry my son and were fearful of what she could say and do," Dodi's father Mohamed, the leading murder theory protagonist, told Reuters.
And there are some truly bizarre hypotheses.
These suggest leaders of a "new world order" assassinated her because she wouldn't marry former U.S. President Bill Clinton, or that she was killed as part of a Satanic ritual, or even that she is still alive having faked her own death.
Alasdair Spark, at the Centre for Conspiracy Culture at the University of Winchester, said doubts about the official version of Diana's death reflected a common belief that the public were always deliberately misled by the authorities.
"At the heart of it is this very strong belief we are always lied to, that any government never tells you the truth," Spark told Reuters. Diana conspiracy theories flourish a decade on (more)
DAILY EXPRESS:
Diana ‘Was Nine Weeks Pregnant When She Died’
DAILY MAIL:
'Diana was pregnant when she died - but Dodi was not the father' claims French journalist
Mark Alexander
