Dislike a Virgin Media

Every so often I'd say at least monthly, but it's easy to lose track) we get a bit of promotional gubbins from Virgin Media. I'd quite like it to stop, but I'm honestly not sure how. It doesn't have our name or address on it, it's simply addressed "to occupier" and the envelope says "delivered by Royal Mail". Does anyone know how to make these unwanted mailings stop? ISTR on a Now Show Mitch Benn bringing folks' attention to a postal equivalent of the Telephone Preference Service, so if anybody has the details for that it could be useful.

(I suppose "Dear Virgin Media, won't someone think of the rainforests??!" could be a start too...)

Thanks in advance.

My tweets

• Fri, 13:09: Am kind of annoyed that I've only just found out about this... http://j.mp/qk0nHK
• Fri, 18:54: Not exactly "recommendations", but... http://j.mp/p1J0OE
• Fri, 19:05: Doctor Mew http://j.mp/qQtCuq
• Sat, 11:10: Dislike a Virgin Media http://j.mp/mTFmTo