The coroner for the inquest into the death of Diana, Princess of Wales has requested all "underlying material" used to compile the Metropolitan Police report into the princess' death.
Baroness Butler-Sloss is to retain tight control of the mass of documentation generated in the three-year inquiry.
"Access to material in the following directions will be in such manner and by such means as may be directed by the coroner," she said.
Lawyers for Mohamed al Fayed, whose son Dodi was killed alongside the princess in 1997, want to see the thousands of pages including the Prince of Wales' interview notes.
Lady Butler-Sloss said interested parties who wish to have access to the material "must provide an undertaking as to confidentiality".
She called on Mr al Fayed's lawyers and other legal teams to provide a list of allegations "of wrongdoing in connection with the deaths" and any evidence they have to support them.
Mr al Fayed claims Diana was pregnant with Dodi's child and they were murdered in an establishment and secret service plot masterminded by the Duke of Edinburgh.
Lady Butler-Sloss, who made the request in written directions, asked for the list to be handed in seven days before the next hearing, which is yet to be set.