The UK's most senior policeman is to go to Paris to re-enact the final journey of Diana, Princess of Wales.
Sir John said he wanted a "feel" for the detail of the crash scene
Sir John Stevens, the Scotland Yard chief, said he would walk and drive the route Diana took as part of his inquiry into how she and Dodi Al Fayed died.
He said he wanted to get a "feel" for the detail of what happened by visiting the scene for himself with the coroner.
Sir John is investigating claims by Dodi's father Mohamed Al Fayed that their 1997 deaths were not an accident.
A French investigation into her death in a car crash in the Pont d'Alma tunnel blamed chauffeur Henri Paul, who also died, concluding he had taken drink and drugs and had been driving too fast.
Royal Coroner Michael Burgess asked the Scotland Yard commissioner to investigate the circumstances himself.
Sir John will drive the route the princess's Mercedes limousine took and also walk from the Ritz Hotel to the Pont d'Alma tunnel.
He said: "I will definitely be going to Paris with the coroner.
"I intend to go to the hotel, to walk the route and to drive the route, and get a feel for the detail of what happened, as all senior investigating officers should do or as would happen for any unexplained death."
A spokeswoman for the Metropolitan Police said the visit had not yet been arranged and it was not known how soon Sir John would go to France.
Officers appointed by Sir John visited Paris in February to meet French counterparts.
They are also studying a 6,000-page report into the crash produced by French judge Herve Stephan.
The inquest, opened by Mr Burgess in January, follows repeated claims by Harrods owner Mohammed Al Fayed disputing the findings of the official report.