Of the BBC’s main radio stations, the one that has proved most resistant to meddling is Radio 3. While Radio 2 has fretted about its core audience and ditched some of its most cherished presenters, and Radio 1 has exercised regular clearouts in a bid to keep up with the “yoof”, Radio 3 has remained a beacon of sanity, offering expertly curated classical music, jazz and “world music”, as well as the best spoken-word radio in the world. Standards have been high, and while listening figures have ne