Nude images of children or any nude image sent to children. I agree with banning the first, but images of adults? Does this include images to teach figure drawing? Biology? Works of art?
No matter how noble the original intent of the law might be, it will absolutely be subject to mission creep. After all, the UK has no First Amendment.
So these filters will soon be checking for “antisocial” content as well. In other words, any content that offends the fascist British government.