Bandmates Tom Rowlands and Ed Simons last played the festival in 2007, and as they made their event comeback, they treated the audience to lasers, clockwork robots and terrifying animation, reports NME.com.
Opening with Hey Boy, Hey Girl, the electro-dance duo launched into a high-energy set to close the second day of the festival, including Do It Again, Go, and Swoon.
Huge inflatable beach balls were thrown into the huge crowd during The Boxer, before ending the set with Block Rockin' Beats, Push The Button and Galvanize.
Meanwhile, the weekend's surprise guests at the festival were revealed as House Of Pain, who sent the crowds into a frenzy with their classic anthem Jump Around.
Other performers included British MC Stormzy and Future Islands, while rapper Missy Elliott headlines Sunday's (13Sep15) line-up.