The BBC's Stephen Jessel in Paris: "Role of Paparazzi was instantly questioned"

The French judge leading the investigation into the princess's death in Paris last August has summoned witnesseses for a group questioning session.

The 10 comprise nine photographers and a driver present at the time of the accident.

The procedure known in French law as a confrontation aims to bring witnesses face-to-face with photographers said to have caused the crash which killed three of its occupants - Diana, Dodi Al-Fayed and Henri Paul, the driver.

Members of Diana's family will be represented at the hearing

Judge Hervé Stephan hopes to get a clearer picture of events on August 31 last year by ironing out any inconsistencies in witness statements.

Diana's family, the parents of the driver and Trevor Rees-Jones, Dodi's bodyguard - the sole survivor of the crash - will be represented by their lawyers at the session.

Al Fayed: civil case

Mohammed al-Fayed, Dodi's father and owner of the Harrods department store, will also be there as an interested party. He is filing a civil case against the photographers.

The BBC's Paris correspondent Hugh Schofield explains how the "confrontation" works

Seven "paparazzi" and a driver were arrested at the scene. Five were freed and two - Romuald Rat, of Gamma, and Christian Martinez, of the Angeli agency - were released on bail.

Romuald Rat: one of the photographers

Even if they are not charged with manslaughter, they still could face charges under what is known as the "Good Samaritan" law, which requires witnesses to an accident to give all assistance necessary to the casualties.

The offence is punishable by up to five years in prison.