Moira Buffini's state-of-the-nation play is pegged to that irresistible trope: the dark and stormy night, with a group of strangers forced to seek shelter in a spooky manor house. Naturally it's a powder keg of personalities, and, with Chekhov's gun well established, a storm of violence is inevitable.However, Manor is a curious beast. It certainly nods to the eerie thriller: with the power out, the only light is flickering candles, and there's a ghostly presence upstairs - a possible remnant of...