Experimental choir present a programme of light and music by Daniel Basford, David Lang, Yoko Ono and Michael Praetorius which they describe as "a meditation on beauty and hope, interleaved with reflections on loss and suffering." London The Wash Houses, 13 December, 5pm–6pm & 7pm–8pm, £15–£12 (includes homemade mulled apple and festive snacks).