How is nobody mentioning the main stage on Saturday. Madness>Jimmy Eat World>The National>Pulp>The Strokes. I wouldn't leave there the whole day.
Seriously. Plus Jane's Addiction, Bombay Bicycle Club, and The Joy Formidable.
Elbow, Frank Turner, The Streets, DFA1979, and Warpaint are pretty terrific on Sunday as well.
Friday's easily the weakest day (for my taste), though I'd certainly enjoy Beady Eye, NFG, MCR, The Offspring, and The Blackout.
Honestly, though, Pulp and The Streets would guarantee my attendance if I lived in Britain.