Britain is undeniably becoming more authoritarian by the day. The government has stripped an unprecedented number of rights from its citizens in the last few years and continues to do so. For instance, the government is about to place significant restrictions on the right to protest.

My question is thus:

At what point does a state become so authoritarian that its citizens would stand a reasonable chance of claiming asylum elsewhere?

(Obviously we're nowhere near that point but it's an interesting hypothetical and also useful to have a vague idea of where the line lies)