Well, I can't speak for Europeon law, but in America, David Hamilton has always been found to be Constitutionally-protected free speech. Constitutions -- maybe you should get one?

Also, I looked up the case you mentioned -- first, he was not convicted, he plea bargained like a dumbshit. Secondly, he was not charged with any kind of "child pornography", but simply with "indecency", which upon further research into British law, appears to have a rather broad definition which outlaws practically everything without taking age into account.