Nowadays, stand-ups who can fill the Enormodome grow on trees. But once upon a time, before comedy was the new rock’n’roll, that sort of thing didn’t happen. Then David Baddiel and Rob Newman played Wembley Arena. It feels like a long time ago. While Newman’s career wandered off the map, Baddiel became exceptionally celebrated as, in effect, Frank Skinner’s straight man. He last did stand-up in 2003, and that was a corporate gig to a roomful of bankers he deliberately offended. Last night he stepped back before an audience to – as he more than once insisted - try out some stuff.