Sad to see UK becoming one of the apologists of internet censorship, closing the gap to the levels of authoritarian countries. Once you have censorship facility in place, the area of its application will only grow. The term "illegal information" is also widely used in Russia for the same purpose.
The cameras tracking everything everywhere in UK would say that it's long been an authoritarian country. Authoritarianism is a sliding scale. From what I can gather, lots of humans that have any political pull at all tend to be authoritarian (against the kinds of people they don't like, of course).
I think it's probably more like a survivorship bias than an innate quality. The only people who are capable of surviving in politics long enough to the point where they have any meaningful influence are the ones who know how to use the systems under their control to protect themselves while tearing down their opponents. Usually this means attempting to consolidate power in themselves, ie. authoritarianism.