I was going to say. The two reasons that come to mind that this hasn't been implimented yet is the shear number of releases per week alongside the fact that they aren't exactly "UK" releases. Though in many respects, i guess they can be called western releases? A fair few do have more than just the US price tag on the back of them so...yeah.
I'm happy with the idea of a trial run like Neferpitou suggested, so we can certainly see how it pans out, and work it out from there.