Mail Online got there before us.

Everything it says about Emma Barnett’s debut performance on the Andrew Marr Show is absolutely right. She gave the combined forces of the BBC’s news and current affairs interviewers a lesson in interviewing. This, their editors must now tell them, is exactly how to get tough with forked-tongued Labour spokesmen like Barry Gardiner.

But don’t just read the Mail. Watch the interview – it is a treat. This is how it should be done.