4chan's lawyer's response:

"In the only country in which 4chan operates, the United States, it is breaking no law and indeed its conduct is expressly protected by the First Amendment."[0]

[0] https://www.bbc.com/news/articles/c624330lg1ko

4Chan responds to £520,000 Ofcom fine with AI picture of hamster

The fine includes £450,000 for lack of age checks to prevent children from seeing pornography.

And now we'll watch the UK take the logical next step which is for the government to mandate that all ISPs in the country block 4chan.

CCP "Great Firewall" style.

Most Brits already have a VPN to beat off so the effect will be negligible.