Guido revealed what went on inside a tense recent meeting of LibDem MPs in yesterday’s Sun column. Clegg defended himself against allegations it had been “easy for him” in government, quipping “If I’d been a Tory it would have been easy.”

One crowd-pleasing line stood out: Clegg calling Cameron “spineless” and saying that while he used his Liberal values as guidance, the PM merely asks “how’s this going to play?”

Something that Tory backbenchers might find themselves in rare agreement with Clegg over.

Expect more public airing of dirty laundry as the Coalition’s divorce day draws nearer.