A British-flagged superyacht has sunk off the coast of Sicily, leaving at least one person dead and six others missing.  

Among those still lost are British tech tycoon Mike Lynch and his 18-year-old daughter Hannah, the chairman of investment bank Morgan Stanley International Jonathan Bloomer, and Chris Morvillo, a lawyer at Clifford Chance. 

It's believed the yacht was struck by a sudden and powerful storm in the early hours of Monday morning. 

Mike Lynch, known by some as the "British Bill Gates", was recently cleared after a high-profile fraud trial relating to the $11bn sale of his software giant Autonomy to US company Hewlett Packard. 

Niall Paterson speaks to our correspondent in Sicily, Ashna Hurynag, to hear about the causes of the yacht's sinking and the investigation into what happened.  

Plus, Danny Fortson, West Coast correspondent for The Sunday Times, talks about interviewing Mike Lynch only a few weeks ago.

Producer: Emma Rae Woodhouse, Laura FitzPatrick
Editor: Paul Stanworth