Planned in 8 minutes - does it take 8 minutes to arrange 'if you say you're not sure, read out the answers and either Tecwin or I will cough when you read out the correct one'. It's ingenious but it isn't complex
I don't see how he could guarantee knowing that it was one of them coughing rather than any other member of the audience, particularly if he'd never met Tecwen or heard his voice.
I agree with most of what prh47bridge says, and the scientific evidence sounds interesting. Where I struggle, however, is in relation to Ingram's strategy. Most people simply wouldn't have taken the risks he did with questions they were uncertain on. I can see why he went for Craig David in response to the crowd's reaction, but not why he was prepared to risk so much on the questions about Haussmann, Holbein and Googol. It may be that he is simply a risk taker, but when you stand to lose the best part of half a million pounds, that is incredibly reckless.
However, that question on its own really wouldn't be enough to convince me that he was guilty beyond reasonable doubt, so the jury's verdict does look pretty rocky. Do we know if it was unanimous or a majority verdict?