Diary: Banksy targets adland

Diary is pretty bored of Banksy and his pedestrian art. But we would be quite pleased if he graffitied some multimillion-pound daub on our wall.

As you can imagine, the people at the production house Network were excited to find a Banksy mural on the side of their building. They seem pretty convinced it's authentic, and no doubt hoping this potentially lucrative addition to their creative output means they'll be laughing all the way to the, erm, Banksy.