The new law will criminalise possession of "extreme pornography", defined as anything depicting:
1) An act which threatens or appears to threaten a person's life
2) An act which results in or appears to result in serious injury to a person's anus, breasts or genitals
3) An act which involves or appears to involve sexual interference with a human corpse
4) A person performing or appearing to perform an act of intercourse or oral sex with an animal
So, as far as I can see, (1) rules out almost all thrillers & action movies, pornographic or not.
(2) rules out quite a lot of thrillers & action movies, too -- any time a woman gets shot in the chest, or anyone gets shot in the groin or arse. Any serious productions of Chaucer are going to be right out.
(3) rules out some great (if unusual, and not especially pornographic) films, such as "Street Trash", "Re-Animator", most vampire movies (including the 60s Hammer ones), "Clerks", "Kissed", and the awesome "Dellamorte Dellamore".
(4) rules out "Clerks 2" (what is it that New Labour has against Kevin Smith?!?).