One of London's small pleasures

Is finding a Banksy - a piece of ... Street Art? Graffiti? you decide. Do go and have a look at his work on his website, and keep your eyes peeled as you walk around London. On this small stretch of the South Bank, I bagged three -the other two are on My Other Stuff. I love the thought that so much of his work must stir the subsversive in so many otherwise straitlaced people.