Paul Lay, editor of History Today, has written a great book about the rise and fall of Oliver Cromwell's Protectorate (1653–1659), England's sole experiment in republican government – and one of the most extraordinary but neglected periods in British history. Having won two civil wars, conquered Ireland and Scotland and seen off Charles II, in 1653 Oliver Cromwell assumed the title of 'Lord Protector of the Commonwealth of England, Scotland and Ireland. But, as Paul explained to Dan, crafting a lasting, stable and legitimate alternative to monarchy was a lot more complicated....