
There was an odd moment on the BBC last summer, during Jeremy Corbyn’s first leadership campaign. A reporter had asked him a simple question about nationalisation: “Where did you get these words from?” he snapped. “Has somebody been feeding you this stuff?”
At the time I was taken aback, but before long the campaign would become defined by paranoia, manifested in its leader as an extreme suspicion of “mainstream media”, and in its supporters as a widespread belief that establishment forces were conspiring to “fix” the Labour leadership contest, the so-called #LabourPurge.