"RATM, Metallica, Feeder, Pendulum, Bloc Party and Dizzee Rascal"
Hmmmm. Rage saw their day and disappeared, only to come back, citing the bands reunion as a vehicle to voice their opinions about the state of affairs America has slid into under Bush (because nobody's done that before) as the reason for the reunion. Yet they say they are currently no plans to make any new albums, which questions the whole thing, really. They would be cool to see if only for nostalgia value.
As for the rest... sorry but LOL. Feeder too have seen their day now and its been far too long since they had a decent record out, I think Pushing the Senses was the last one in 2005 and it wasn't really very good. Unless their new album is on par with Echo Park then I am not interested. Metallica are ancient and past it, Pendulum are the epitome of utter cheese, Bloc Party are atrocious and I don't even class Dizzee Rascal as "music". I remember when Leeds and Reading showcased bands which were top of their game, not a bunch of has-beens itching to get back into the action.
Like I said, T in the Park or Latitude (if only for Sigur Ros and Bill Bailey) now that Truck and ATP is already sold out.