YouGov has Labour up one and the Tory lead at five but the story getting all the attention this evening is the claim that Samantha Cameron might have voted Labour previously

For many, not just mathematicians, the Riemann hypothesis is the very definition of a supremely difficult problem that might be forever beyond our intellect. Most mathematicians had given up on it, being pessimistic about making any headway. But recently, the first progress – although not a solution – in more than 50 years has been