George Osborne has revealed that the Tories held a crisis summit at Chequers this morning on how to deal with the UKIP threat. Both government and party sources refuse to discuss attendees or indeed what was on the agenda. Leaving a breakfast event hosted at No.11 for alumni of Magdalen College, Oxford, the Chancellor explained his premature exit by telling attendees he was taking the unusual step of going to the PM’s official countryside residence in the middle of the week for the meeting. An important pit stop on the way to Newark…