A tech tycoon - dubbed the "British Bill Gates" - and his teenage daughter were among the seven people killed after a luxury superyacht sank this week. Bayesian capsized off the coast of Porticello, Palermo, on Monday morning during stormy conditions. It is thought the weather caused a freak water spout , which develop downwards in thunderstorms, and this struck the boat's huge mast.

But the official cause of the disaster is yet to be determined, although investigations continue. This is one of several key questions still left unanswered following the tragedy, which killed entrepreneur Mike Lynch, 59, and his 18-year-old daughter Hannah . Hannah was found alone in her own cabin on board the superyacht , it emerged on Saturday night.

The bodies of Recaldo Thomas, who was working as a chef on the vessel , along with Morgan Stanley International bank chairman Jonathan Bloomer , his wife Judy Bloomer, Clifford Chance lawyer Chris Morvillo and his wife Neda Morvillo were also recovered at the scene. Italian prosecutors have opened manslaughter investigations into each of the deaths. Termini Imerese prosecutor Ambrogio Cartosio said on Saturday: "For me, it is probable that offences were committed, that it could be a case of manslaughter, but we can only establish that if you give us the time to investigate.

" Although it was reported Mr Lynch had organised the trip as a celebration, following his acquittal of fraud charges in the US , it is unclear where exactly the group started t.