It’s a service delivered in the UK, though, so it should have to abide by UK law. The problem is we’ve had the internet for 30+ years now and we’re only just getting round to thinking about this stuff, so it’s become normalised that the internet is just this lawless, godless, Wild West place. No one has really got a handle on the notion of what it means for the internet to be everywhere and nowhere. How do you legislate for that? The government is decades late to dealing with this stuff, so it will be all the harder to do anything, and that’s before you even get to thinking about whether what they’re doing is a good thing.It's American and you're accessing an American server by viewing it. It doesn't need to abide by UK laws in the same way we can talk about the Tiananmen Square massacre on this UK website, despite it being illegal in China.
If the UK wants to block it, that's an option, not one I support, but they can try, Wikipedia too by the sound of it. It just highlights how desperate the Government is.