Return of Dario Fo and Franca Rame's political farce begs a question: can theatre ever be as potent as documentary? There is a fascinating role reversal going on in London theatre. Behind the elegant Corinthian facade of the Theatre Royal Haymarket, an ebullient satire on police corruption, Accidental Death of an Anarchist, has arrived by way of the Sheffield Crucible and the Lyric Hammersmith. Meanwhile Somerset Mau…
