First, a confession. Even an ardent radio addict can enjoy a fortnight away from the airwaves, disconnected, switched off, unlistening. On return even the programmes that are usually ignored because they’ve become so familiar catch your attention. I grew up with Gardeners’ Question Time as a regular weekly slot on Sunday afternoons, snooze time for my overworked Dad, but stopped listening after the great schism of 1994, when the entire panel abandoned the BBC and moved over to the new Classic FM station because they didn’t like the way the BBC was handing over its production to an independent company....