I’m trying to imagine what Britain would look like under a Ukip/Conservative coalition with Cameron as PM and Farage as his deputy. The idea fills me with horror.

I think, for example, of the runaway economic boom which would result from the sudden dash to exploit our superabundant shale gas resources; I think of the revolution which would occur in education were free schools freed to make a profit; I think of the rolling back of political correctness, the reinvention of the NHS on the Singapore model, the epic reduction in public spending, the cancellation of High Speed 2, the death...