>>213179067 (OP)
The government brought into effect the Online Safety Act, which forces you to prove you're 18 to access 18+ material. But since the government are complete retards, you can get around this by doing something as simple as googling a photo of a UK driving licence or getting Sora to generate one, and then just uploading that.
4chan isn't affected by it though.
>>213179067 (OP)
Western countries don't order ISPs to block "illegal" websites like China or Russia do, they instead rely on punishment for non-compliance. That means companies who have zero presence in the UK and never will have a presence in the UK, like 4Chan Community Support LLC, can just ignore the law since there's no way to enforce any punishment.