Opus, Barbican Theatre, London
Barbican Theatre, London: It has long been established that Circa's director Yaron Lifschitz is some sort of virtuoso. Like great writers whose words appear to flow on to the page, he creates show after stunning show as if by magic. Doubling his usual number of acrobats to 14, he has melded them with his love of Shostakovich's chamber music. The fact he wants it played at his funeral suggests its mournful n…