To Radio 2 to meet Bob Shennan, controller of the BBC’s most popular radio station (the station attracts one third of all listening hours) and now also head of the newish monolith that is BBC Music. Why corral all of the Corporation’s music output on radio and TV into one enormous sub-division (on a par with BBC News, BBC Drama and BBC Sport)? Isn’t this just another cost-cutting compromise, a way of saving money by smoothing out the BBC’s output (its first production was that weird mish-mash of God Only Knows by a constellation of stars)? How will specialist stations...