The French company that owns the car in which Princess Diana died wants the wreckage back so it can be sold, possibly for as much as £1 million ($2.6 million).
The wreckage of the black Mercedes S280 has been held in London since July 2005, as part of
the inquest into Diana's death.
Paris company Etoile Limousines now wants the wreckage back, London's the Mail on Sunday reports.
"It's worth a great deal of money," Etoile manager Jean-Francois Musa told the paper. Diana, her lover Dodi Fayed and driver Henri Paul died when the car crashed in the Alma Tunnel in Paris in the early hours of August 31, 1997.
The Mail on Sunday said Musa planned to offer the wreckage to Dodi's father, Harrods owner Mohamed Al Fayed, who has rejected the idea as "disgusting". It said Diana's sons, Princes William and Harry, wanted the car disposed of "privately and discreetly".
The car could fetch as much as £1 million, the Mail on Sunday said.
It added that informal offers to buy the wreck had come from all over the world, mainly the United States.
Musa said his company had never received compensation after the crash.
"Nobody has the right to dispose of the car except us."
The report said former Metropolitan Police Commissioner Lord Stevens, who headed the investigation into Diana's death, was negotiating with French authorities to return the Mercedes to France.
- AAP