Labour leader Ed Miliband appealed to voters today not to treat tomorrow's poll on electoral reform as a referendum on Nick Clegg.
The British love their traditions. That is why the No2AV campaign has used the argument that it is defending a voting system that has served us, so David Cameron claims, for "centuries". But the reality is that our voting system is not a timeless ritual sanctified by antiquity but something that has evolved. Here are some key dates: