Performer: London Sinfonietta Academy Ensemble

To judge by the continued chatter, no-one noticed 100 metronomes on stage being set in motion, signalling the beginning of György Ligeti’s Poème symphonique (1962). Even when the lights were dimmed it only dawned on people slowly that the concert had actually already begun.

Two sisters, a knight, a miller, and a blind harpist. Such is the cast of Tony Harrison and Harrison Birtwistle's Bow Down, their 1977 music-theatre piece currently being toured around the UK by The Opera Group. It's an elemental, mythic piece, but also a testament to the endless capacity for novelty that old, grim folk tales like this have.