This complexity is no accident. The UK, unlike almost any other country on earth, lacks a written constitution. The rules about how the rules are made are set through 'convention', an endless fudge that ultimately amounts to them being made up by our rulers as they go along.
We see this most clearly in how the domestic territories of the British state are governed: Scotland, Wales, Northern Ireland, Greater London and the City of London each has its own arrangements, each absurd in its own way. Each of these messes leaves a different tangled thicket in which the crooks of the world can hide their cash.
Seen from the perspective of international capital, though, it is the Overseas Territories, as well as the Crown Dependencies of Jersey, Guernsey and Mann, which form the most significant part of this complex. They use the malleability of the British constitution to form a network of safes in which the rich can hide their cash.
A new era
Although no one knows for sure how much money is hidden in tax havens, of which the British territories make up a significant chunk, the figures involved are so vast that academics at the Transnational Institute in the Netherlands have described them as "the backbone of global capitalism".
Seen this way, the constitutional flexibility of the British state isn't just some post-medieval hangover. It's a hyper-modern tool in an era of global surveillance capitalism, where the rich can flit around offshore while the rest are forever trapped by borders.
Through its empire, the British state played a key role in inventing modern capitalism. Now, the UK is helping reinvent capitalism once more, by extending the protection of a constitution designed by the powerful, for the powerful, to the billionaires, oligarchs and criminals of the world.