Princess Diana Conspiracy Theories

One explanation from a source of conspiracy theories, Larouche
http://www.larouchepub.com/other/2000/steinberg_diana_2727.html

Mohamed Al-Fayed, the father of Dodi Fayed, and the owner of Harrods Department Store in London and the Paris Ritz Hotel, has labelled the Aug. 31, 1997 crash a murder, ordered by the British royal family, and most likely executed through agents and assets of the British secret intelligence service MI6--with collusion from French officials, whose cooperation in the cover-up would have been essential.