As anyone who had the pleasure of hearing Charlotte Green dissolve in a fit of giggles on the Today programme a few weeks ago will know, radio can be very, very funny – intentionally or otherwise. I tuned in to BBC Radio 2's When Charles Met Wyclef on Saturday evening, expecting some hilarious clangers from the meeting of Charles Hazlewood, the Christ's Hospital- and Oxford-educated classical music enthusiast, and the Brooklyn-raised hip-hop supremo Wyclef Jean.