The image of Tony Blair and David Cameron exchanging frilly skirts and pearls is certainly arresting, but the Prime Minister’s reference in California last weekend to rampant cross-dressing was, disappointingly, political. For all the comment that his remarks have engendered, however, we have been here before. When the Economist coined the term ‘Butskellism’ in 1954, it was simply observing that, as Gaitskell wrote after being succeeded by Butler as chancellor, the Conservatives ‘have really done exactly what we would have done, and have followed the same lines on controls, economic planning, etc....’ Both parties were effectively interchangeable, working within the same framework of a mixed economy and government responsibility for full employment.