Ever heard Bertolt Brecht sing? Visit 6:00 into this programme (while it lasts on iPlayer) to hear an extract from Mack The Knife, recorded in 1929.

If you’re interested in voices and can’t exactly place the face of the narrator in the photo (on iPlayer) – it’s Andy Serkis, who has played not only Ian Dury but Gollum (in Lord of the Rings).