Constitutionally, in the seventeenth century, the UK led the world.

Today, constitutionally, the UK is a bugger’s muddle, replete with half-finished reforms and seemingly endless ambiguities.

And then there’s the Scottish question. And the Northern Irish question. And the Welsh question. And the West Lothian question.

They may not be urgent, but they are important. And they stir profound passions about and within the Union.