Yeah but in comparison the political systems of most other countries are all pretty novel, even experimental, and all somehow unique, even if they're analogous.

Yeah but in comparison the political systems of most other countries are all pretty novel, even experimental, and all somehow unique, even if they're analogous. They're all pretty ad hoc, and most have only existed for a fairly short period compared to the British system. Every country is an evolving landscape politically and legislatively. I also wouldn't say "most" aspects of monarchy aren't covered by written law, perhaps only codified rather than strictly planned but they're not undefined. Plus it's a common law system, and so not really comparable to systems of public law.