Slowly, very slowly, the audience begins to arrive. Taking their seats, shedding jackets, arranging bags and glancing at programmes. But already, there's a stir: the imposing figure of actor Jonny Donahoe is at the centre of things, striding across the stage, talking to audience members, recruiting volunteers and handing out slips of paper. There's a […] The full version of the article Duncan Macmillan's Every Bril…