There is no official confirmation that the Yacht was struck by lighting .. at all because of the damage left by the fire .. as fire officers have yet still to confirm the cause of the fire ..
http://www.dailymail.co.uk/news/arti...-quayside.html.
The 112ft long Sunseeker boat was ripped apart by flames that leapt 60ft into the air, lighting up the night sky above Poole Quay in Dorset. Crowds gathered around the inferno that gutted the yacht's three decks and left just the hull a smouldering wreck. The luxurious craft was all but complete having been built for a Mexican tycoon who had just arrived in Britain to take delivery of it. It is understood the 40-year-old businessman was on the dockside at Poole to witness the blaze.