A very fine piece of stencil art, and not by Banksy this one is signed with a tag by DBase. While I love Banksy, it's nice to remember occasionally that there are other street artists around that do very fine work, and this is an example. It's been here for years (since 2004 I believe), and I guess will be around for many more, as it looks like the owners of the building like it!
It shows what to me look like a pair of bouncers, looking around, their heads replaced with CCTV cameras. Appropriate on the back door of a pub maybe read more