"Come to London", say the words spray painted across a tourist poster of an ancient Middle Eastern city. This piece - by the art collective Bank - is the perfect introduction to Location: UK, a group show which explores different perceptions of Britain. There we are, thinking we live in a happy, tolerant, democratic country, a place that, surely, anybody from the Middle East would rather live right now. But look again at the blood-red graffitied lettering in Come to London and maybe this poster is saying something else - maybe it's saying come to London and give its smug face a great big kick in the teeth.
Come to London is filled with a tension and topicality that …