What I’ve done here is paint someone doing a street picture - ironic because I do street pictures myself - but instead of a hooded youth… it’s an old lady!
To extend the metaphor I took the slogan “keep Britain tidy” and use that instead of something rude. Basically, old ladies do think that slogan is good so that bit is accurate, but also it’s a commentary on how graffiti is seen as untidy when actually it’s often some of the cleverest “advertising” out there! You’ll laugh when you get it.
(Click on the photo for a special Banksy surprise!)