Glyndebourne's celebrated production of Nikolaus Lehnhoff's Tristan und Isolde is a supremely intelligent achievement; gravely beautiful, haunting and meditative, it is deeply reflective rather than visceral, fortified by Roland Aeschlimann's stunningly effective set, a womb-like space through which the protagonists move like gods. Conductor Jiří Bělohlávek mirrors Lehnhoff's approach in his sophisticated plumbing of the score's depths, with every shift in texture carefully laid bare by an inspi...