trying to save her life. Charles accompanied Diana's body to the UK later the same day. They departed from Vélizy – Villacoublay Air Base and landed at RAF Northolt, and a bearer party from the Queen's Colour Squadron transferred her coffin to the hearse. The coffin was draped with the royal standard with an ermine border. Her body was taken to the Hammersmith and Fulham mortuary in London for a post-mortem examination later that day. Initial media reports stated that Diana's car had collided with the pillar at , and that the speedometer's needle had jammed at that position. It was later announced that the car's speed upon collision was , about twice as fast as the speed limit of . In 1999, a French investigation concluded that the Mercedes had come into contact with a white Fiat Uno in the tunnel. The driver of the Fiat was never conclusively traced, although many believed that the driver was Le Van Thanh. Thanh was questioned by French detectives in 1997, who ruled him out as a suspect but friends and family members have noted inconsistences in his story. Thanh has since refused interviews or inquiries from investigators. The specific vehicle was not identified. British Foreign Secretary Robin Cook remarked that, if the crash had been caused in part by being hounded by paparazzi, it would be "doubly tragic". Diana's younger brother, the Earl Spencer, also blamed tabloid media for her death. An 18-month French judicial investigation concluded in 1999 that the crash was caused by Paul, who lost control at high speed while intoxicated. "No charges were brought against the paparazzi who had been pursuing the princess' car." Mourning Members of the public were invited to sign a book of condolence at St James's Palace. A book of condolence was also set up by the British embassy in the US. All 11,000 light bulbs at Harrods department store, owned by Mohamed Al-Fayed, were turned off and not switched on again until after the funeral. Throughout the night, members of the Women's Royal Voluntary Service and the Salvation Army provided support for people queuing along the Mall. More than one million bouquets were left at her London residence, Kensington Palace, while at her family's estate of Althorp the public was asked to stop bringing flowers as the volume of both visitors and flowers in the surrounding roads was said to be causing