See what’s happening at the Tate. Waldemar Januszczak at The Times thinks it’s a wank: “watching an organisation as institutionally snobbish as Tate Modern trying to get down with the kids is already a ghastly sight. The art world is crazy about street art just now. And Street & Studio [the photography show inside] was mounted, I suggest, in a deliberate attempt to up the tone of the external graffiti.”