"Having reviewed the exercise and its findings, I am satisfied that there is no evidential basis upon which therefore to reopen any criminal homicide investigation or refer the matter back to the coroner.
"In light of this information, I have today also written to the Royal House and Lord Justice Baker informing them of the above and providing a copy of the concluding summary."
Diana, Dodi and chauffeur Henri Paul died after their Mercedes crashed in a Paris tunnel after leaving the Ritz Hotel on the morning of August 31 1997.
The hearing into the deaths of Diana and Dodi lasted more than 90 days with evidence from around 250 witnesses.
The inquests concluded on April 7 2008, with a jury returning a verdict that the "People's Princess" and her boyfriend were unlawfully killed.
After the hearing, Metropolitan Police said they had spent £8 million on services arising from the inquest and the Operation Paget investigation from 2004 to 2006.
That money includes the cost of the legal team which represented the force's commissioner at the inquest, police protection for the inquest jury and paying for the Paget inquiry, reported to have cost £3.6 million.
Former Met Police Commissioner Lord Stevens's Paget investigation was launched in 2004 at the request of Michael Burgess, the Royal Coroner, who was then overseeing the future Diana inquest.
The former top policeman published his report in December 2006, rejecting the murder claims voiced by some, including Dodi's father Mohamed al Fayed.
