What counts as offensive in these days of cancel culture? Ham-fisted pronoun usage? Culturally appropriated hairstyles? To remind us that other options are still available, the Menier’s new space, the Mixing Room, is staging a world premiere of a two-hander choc-full of old-school profanities, grotesquerie and gore: Brian & Roger, which comes with the subtitle A Highly Offensive Play and, indeed, it often is offensive. Don’t go if the c-word bothers you.The Menier opens its new second stage with this podcast-turned-play. Theatre review by Helen Hawkins