Just looking at the times and have realised this is on Sunday. Hasn't it always been Saturday night?
It makes much more sense having it on Saturday. If people want to get munted to the repetitive beats, then Saturday is just more practical.
Ok CSS are the crappest headliner they've had on this stage for ages. But Unkle last year and Soulwax the year before that were 2 of my highlights of recent years.