Fagballs (Level 3)

Hmm just read synopsis for that, doesn't seem to be it :(

Aite, yo guys.
For a couple of months now I've been trying to remember a horror film I'd seen on Film4 about one year back possibly, I've always thought it was 'Creep' until recently when I read the whole synopsis for Creep.
 
Anyway I didn't catch the whole film but this is what I remember (might not be 100% correct):
 Woman is getting chased by a murderer towards a farm or something, there's some slow scenes through a greenhouse kind of area with crops where she's getting chased down. Possibly another guy gets dragged in here and gets murdered, though I'm not sure on that. The woman ends up getting in a vehichle and escaping the area to later confront the murderer on the road and end up killing him herself. 
What I've explained is probably the closing 30 minutes of the film, it was set in night time. If anyone has any clue what it is, help me out! :D