This comment section will inevitably fill up with comments from people who have exactly the same thing to say, namely, that internet censorship is bad. That opinion has transcended the good-take-bad-take dichotomy: it's entered the pantheon of ideas that are seamlessly dumped into any mildly-related discussion and act as an impediment to any more interesting ideas.
Here's a more interesting idea: because the pornography that's banned by this bill is made mainly in the US and Eastern Europe, and because it's distributed by businesses that are also located outside the UK, the UK has negligible ability to impose regulations that differ from other jurisdictions on the dividing line between legal and illegal pornography. The age verification system was imposable because there are very few websites that span the porn/not-porn divide, but this new bill regulates at too fine a level to enforce.