Nicholas Hytner’s production of Mozart’s Così fan tutte, seen at Glyndebourne in 2006, is about as traditional as it gets. The story is straightforwardly told and the settings and costumes are 18th century Naples, or at least some operatic approximation of it. That said, it’s immensely enjoyable and, just occasionally, goes beyond the superficial. The strength lies in the casting and in the director’s decision to allow his young singers to behave like young people. Miah Persson as Fiordiligi and Anke Vondung as Dorabella are close to perfect in their exuberant girlishness. Naturally Vondung gets to be a bit ditzier than the angstier Persson because that’s how the thing is written. Both of them sing extremely well too and there’s nothing lacking in the big solos or duets.