The UK has faced its own constitutional questions recently.
They are a throwback, in some senses. Back in the days of Henry VIII, the popes of Rome held a sizeable influence over the politics of England and muddied the waters some. In the case that brought matters to a head, the king wanted to marry a new wife, and the pope said he must stay with the first one. The problem wasn't so much that the pope's position was untenable. It was that he supposed it was his decision to make. Our Henry solved the issue by dissolving numerous monasteries and chucking the pope's people off our island.
He got his new wife. Indeed, he got another five of them, one after another. And Britain freed itself of European interference, at least via the papal channel.
A dispute with a continental European organism is happening again. This time the EU is the entity. And the British people decided to chuck them out. In their infinite wisdom, the people decided that we were better off making our own decisions, even if sometimes they are mistaken ones.
The good news is that in the end, even though things have looked messy while they are proceeding, our constitutional structure looks like it is going to survive the test. Indeed, the experience in the rear view mirror will provide some useful wisdom, if only about how not to do things next time! But also that the proper seat of authority and decision-making lies in the UK, and not outside it.
Frankly, I think the quirky constitutional monarchy architecture is actually a robust one. There needs to be a body responsible for assuring the trustworthiness of the whole political system that is independent of the particular characters passing through it at any point in time. We also need to figure a way to remove a Speaker that is partisan.