Name of Series
 

Hi I wondered if anyone could help me?
I remember watching a British detective show, I think in the 2000's and I think it was on ITV . Basic story was the "bad" guy took his girlfriends, in a transit van, to a deserted factory had the "good" sex in the front getting the girl naked. When they had finished he would take her to the back of the van. When he opened the door the camera panned in to show 3 or 5 more guys waiting in the back. He would push the girl in shut the door and walk of. And a gangbang would ensue :D
If anyone can remember or know of its title the information would be greatly appreciated