Submitted. Go Brockley!

Grafitti artist Stik is known to have done some work around SE London, and has previously collaborated with Dulwich Gallery on creating murals in East Dulwich. Would be great if he could somehow be persuaded to be involved.

Below some pics I took his and other people's work around Brick Lane (some good, some great, some pretty horrible - but, if done legally and in a dedicated space, almost always better than a grey wall)

http://www.imageplotter.com/CityScapes/S.../i-nbJVqTL