London helicopter crash: Two people killed

London helicopter crash: Two people killed; GV St George's Wharf Tower and damaged crane shrouded in mist Reporter to camera Top of St George's Wharf Tower in mist Chris Yates (Aviation Expert) interview SOT - On why pilot would have diverted helicopter because of fog Boris Johnson (Mayor Of London) towards with police officers / press conference SOT - There are all sorts of questions that people are asking now, about tall buildings, about lighting, about fog, about the usage of Battersea heliport. And those are very understandable questions in these circumstances because people will naturally want to know we are doing our level best to make sure that London is protected from aviation accidents of this kind. Those are matters that are now being investigated, it would be wrong for me to pre-empt any of that, you'll understand that