The Cinematograph Films (Animals) Act 1937 is an Act of the Parliament of the United Kingdom. It defines a criminal offence of distributing or exhibiting a film that was "organised or directed in such a way as to involve the cruel infliction of pain or terror on any animal or the cruel goading of any animal to fury" - in other words, one in which actual cruelty to animals was photographed and/or occurred during the production. From Wikipedia
