Lord Justice Scott Baker said further inquiries were not necessary

Lord Justice Scott Baker said it was neither "appropriate or necessary" now but he would review his position.

He was responding to requests made by Michael Mansfield QC, for Dodi's father Mohammed Al Fayed, at a hearing ahead of the inquests due in October.

Diana and Dodi died in a car crash in Paris in 1997.

'Powers at work'

Mr Mansfield had asked the coroner to urge Prince Philip to "answer inquiries" and the Queen to agree to be a "potential witness".

But Lord Justice Scott Baker told the High Court hearing: "It doesn't seem to me that any further inquiries at this stage would be appropriate or necessary."

Mr Mansfield said he wanted the Queen to be asked about a conversation she allegedly had with former royal butler Paul Burrell, referring to "other forces or powers at work within the state".

He also raised the issue of the duke allegedly sending what one witness described as "nasty" letters to the princess.

Mr Mansfield said the Metropolitan Police inquiry into the deaths - which concluded they were a tragic accident - did not make any of these inquiries.

It also emerged that Diana's original note to Mr Burrell containing claims that her husband was "planning an accident in my car" had been obtained for the inquest.

Mr Al Fayed, owner of Harrods department store, alleges the crash was part of a secret plot by the British establishment.

Lord Justice Scott Baker replaced Baroness Butler-Sloss in June when she stepped down saying she lacked the experience required to deal with an inquest with a jury.