Thomas Adès’ latest opera, The Exterminating Angel, is probably his most ambitious and best to date. It received its US premiere at the Met in 2017 and was broadcast as part of the Met in HD series, subsequently being released on DVD and Blu-ray. It’s based on the surrealist 1962 Buñuel film. It’s a very strange plot. A group of more or less upper class guests attend a dinner after an opera performance. All the servants except the butler have (inexplicably) left the house. The guests seem unable to leave the room they are in nor can anyone from outside enter it. This goes on for days(??) during which the guests accuse each other of various perversions including incest and paedophilia and turn violent while still expressing delicate aristocratic sensibilities like an inability to stir one’s coffee with a teaspoon. There’s a suicide pact, a bear and several sheep involved before the “spell” to escape the room is discovered. What happens afterwards is unclear. (The opera omits the closing scenes of the film). It’s very weird and quite unsettling; Huis Clos meets Lord of the Flies?