Dry wit is a much under-appreciated quality in this age of high-impact sledgehammer communication. In an election full of sub-standard soundbites and slogans signifying almost nothing, there is an especially strong case to be grateful for the occasional appearance of wit.

There was the moment when Nigel Farage mocked the Plaid Cymru chap who was opposing a crackdown on foreign students bringing in dependents by telling him that if you had got a place as an overseas student at a British university it didn’t mean that you should be able to bring your mum.