While the US doesn't exactly have an untarnished record with free speech, at least it is a constitutional right. The UK, on the other hand, doesn't guarantee freedom of speech and has in recent years banned certain forms of literature. Michael Savage is banned from entering the UK and was compared to violent religious and racial zealots, even though he never told anyone to use violence. From Wikipedia: > "On 6 Decemb…
That being said, the number of clauses in which freedom of speech is 'restricted' means that the UK doesn't strictly have freedom of speech. You are even free to speak as you want or not. The UK falls into the latter category.