Dumpster Diving London

Are there any dumpster divers in London out there? I'm kind of new to this and so far have only hit the occasional Co-Op and Budgens for relatively small hauls. I'm looking to meet up with any active dumpster divers in the north London area. As I said I'm relatively new to this but I'm looking to start heading out with a small group and would love to join/make one. I'm a driver so don't worry if you don't have a vehicle. Let me know if you're interested or you can point me in the right direction.

Cheers.