Food for thought for the leaders of the main three parties in Lord Ashcroft’s latest polling. Over a fifth of those who voted Tory in 2010 jumped to UKIP yesterday. Interestingly, almost the same proportion of Chris Huhne’s voters chose the UKIP candidate this time round. Diane James also took 17% of Labour’s 2010 vote. Just 59% of 2010 Tories voted blue and only 51% of those who voted for Huhne backed Mike Thornton. UKIP are taking votes from all three parties…