Aha - I'm not alone, then!
I am a wannabe Guerilla Gardener in Salisbury but without enough land of my own to grow much (though I do have light shed!) We are quite fortunate, really - Salisbury and the surrounding areas are generally lovely and green. However, I'm sure there must be some ugly places around the city that we can practice the green art upon?
Count me in - and I'll get looking! I already have my eyes upon a neglected patch of land in Wilton which I may just practice on (the Environment Agency will probably mow it all down, but I can but try)