Ever since Jeremy Corbyn was elected Labour leader, Tory researchers have been scouring the archives for evidence of gaffes and outrages he may have committed during his lengthy and previously obscure career. Now, it seems, Owen Smith’s researchers have been scouring the archives too.

“I’ve never used bad language against anyone,” sniffed Mr Corbyn at tonight’s leadership hustings in Glasgow. Presumably he said this to remind Labour members that, a few days ago, Mr Smith had called him “a lunatic”.

Mr Smith retorted that he’d apologised for using such an insensitive word. But did the audience know, he went on, that in 1992 a Tory MP had been publicly derided as “a lunatic” by one J Corbyn?

In surprise, everyone looked at St Jeremy.

“I’d rather we got on to discussing politics,” he sniffed.

Mr Corbyn does a lot of sniffing.