During a general election year, broadcasting schedules become even more cautious about political balance. But theatre is not subject to a Representation of the People Act and so, as the May poll approaches, the listings contain even more anti-Tory plays than normal.It seems clear, for example, that one of Jamie Lloyd’s two main reasons for staging the first major production since its 1969 London premiere of The Ruling Class is that the scene in which a clinically insane Old Etonian aristocrat is examined by a doctor who is also an Old Etonian and escapes committal on the grounds that he is merely mildly eccentric by the old school’s standards. Also calculated to be uncomfortable for the present Coalition Government run by a wearer of that particular school tie is a climactic s