If you’re going to pull out the big guns for surprise guests at a festival, you might as well invite Radiohead. It looks like at least two members of the band got the invite, because Thom Yorke and Jonny Greenwood popped up in a surprise performance on the festival’s Park Stage over the weekend. Introduced by festival organiser Michael Eavis, the duo performed an indulgent set of lesser known numbers before launching in to an acoustic performance of ‘Karma Police’ and then ‘Street Spirit (Fade Out)’. “Have a brilliant festival everyone,” Yorke told the crowd as he left the stage, “see you guys later.”