American scientist Dr Robert Ballard (centre), who led last year's deep sea expedition to film the wreck of the Titanic, in London for tomorrow's publication of his book 'The Discovery of the Titanic'. With him are two British survivors Eva Hart, 82, of Chadwell Heath, Essex, and Bertram Dean, of Southampton. They are standing next to a model of the liner, which sank off Newfoundland on her maiden voyage in 1912. *Nationals Out