Age: 67.
Appearance: David Dimbleby's little brother.
Who is he? He's David Dimbleby's little brother.
Is that it? Well, no, he's an enormously successful journalist and broadcaster in his own right, but he has always lived at least a little in his elder brother's shadow.
Why's that? Because anything Jon can do, Dave can do better.
Such as? Presenting question-based broadcasting, for one. While his brother travels the country chairing Question Time for telly, Jonathan has to make do with Radio 4's illustrious but considerably less glamorous Any Questions?
So he's the disappointing younger brother, then? I think he thinks of himself more as the cool, rebellious one.
And what are you basing that on? Mostly the interview, published yesterday, in which he admitted to having smoked cannabis twice and, on one occasion, snorted cocaine.
No! A white middle-class man in the media dabbling in drugs at some stage in his life? I am shocked and appalled. In his defence, he said of the cocaine that he "sneezed it all over the place" and apart from blocking his nose, it didn't actually do anything to him.
Because he was already loud, randy and self-obsessed? Probably mostly because of the sneezing.
Oh, right. So was he just trying to be edgier than David or was there a reason he was talking about drugs? There was another reason, yes.
Which was? He's presenting a new BBC2 show about South America, during the filming of which he saw first-hand the misery and chaos caused by the cocaine trade in Brazil and other countries and became convinced that the criminalisation of drugs causes more trouble than it's worth.
So he's calling for drug legalisation now? Well, he is the cool, rebellious one.
Not to be confused with: David Dimbleby, David Dimbleby lookalikes, life-size models of David Dimbleby.
Do say: "Yes, I have tried cocaine but I didn't inhale."
Don't say: "Put that in your crack pipe and smoke it, David."
