Top Gear presenter James May added a little star horsepower, if you will, to the puntastic Drive 2 Digital radio conference at the BBC's newly refurbished New Broadcasting House on Monday. Hoping that he was on message, organisers were no doubt delighted to hear he has five digital audio broadcasting (DAB) radio sets at home. Bravo! Unfortunately he then offered up a nugget which was the conference equivalent of putting diesel into a petrol car. "I don't have one in my car, I'm ashamed to say," admitted May. "I think that probably is a bit of an issue." At at industry conference designed to encourage drivers (and motor manufacturers) to put DAB in their car? Possibly.