The Reformation is such a huge, sprawling historical subject that it makes sense, in this the 500th anniversary of Martin Luther producing his 95 Theses, to break it up into bite-size pieces in order to sample its distinctive local flavours. Eamon Duffy, emeritus professor of Christian history at Cambridge, takes England as his territory, and quickly deprecates the very word Reformation as an ‘unsatisfactory designation concealing a battery of value judgments’.