Death in Venice of 1973 is Benjamin Britten’s final opera. Based on Thomas Mann’s eponymous novella of 1912, it tells of a writer Gustav von Aschenbach who becomes obsessed to the point of madness with a youth who he repeatedly sees while in Venice. Given that the pair never speak to each other, it might not feel like obvious dramatic material but it has spawned a classic film (starring Dirk Bogarde) as well as Britten’s own masterpiece. It is possible to see the...