Andrew Marr must have either devoured a couple of extra shredded wheat or gulped down a tin of spinach before this morning's The Andrew Marr Show. He fired ace after ace at Boris Becker (who put in a terrible performance), hunted Jeremy Hunt like a pack of James Naughtie-impersonators, fired a few potshots at that nice Nia Griffith's defences, and even put author Robert Harris into the dock over the morality of his dealings with Roman Polanski. His audience must now be feeling shell-shocked. (I'm off for a lie-down in a darkened room). We've not seen anything like this since Emma Barnett stood in for him.