Virgin Atlantic sources told The Guardian that four of the eight celebrities whose flight details were allegedly leaked to a paparazzi firm, flew on the dates given by the airline employee.
Ashley Cole and Sienna Miller were pictured in Heathrow and Los Angeles respectively, on the dates allegedly provided. The other four celebrities are believed to have cancelled their flights.
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The 19-year-old was rushed to hospital by friends, but died a short time later.
The launch was delayed for about two weeks because of bad weather and a mechanical problem.
Some details of the hearing, such as the order of their appearance, remain in negotiation.