Music fans at Latitude were braced for more surprises on the festival's tenth anniversary with strong indications that Thom Yorke will play an unannounced intimate gig tonight.
The Radiohead frontman's long-term collaborator and producer Nigel Godrich tweeted a picture of the cover for the singer's latest solo album, Tomorrow's Modern Boxes, with the Latitude logo emblazoned across it.
Organisers were unable to confirm whether Yorke would perform but after last night's sensational late-night surprise set from Ed Sheeran, festival goers are anticipating more 10th birthday treats.
The local hero delighted around 3,000 fans lucky enough to make it in to one of the site's smaller stages, deep in the woods at Henham Park, Suffolk.
The singer songwriter's set continued the festival's long tradition of unannounced shows, with Rudimental and Lily Allen performing in recent years.
Revellers have enjoyed clear blue skies and bright sunshine on the first two days of the festival, with temperatures set to reach around 24C this afternoon.
Many cooled down by swimming in the site's lake which organisers have opened up for the first time this year.
Among the scheduled musical highlights today are trip hop pioneers Portishead, headlining the Obelisk arena.
Folk singer Laura Marling, indie poppers the Vaccines, pop star Lianne La Havas, Britpop stalwarts the Charlatans and Manchester singer songwriter Badly Drawn Boy also feature.
Last night Alt-J drew the biggest main stage crowd of the festival, playing a hit-packed set spanning their two albums.
Elsewhere electronica producer Jon Hopkins, who has worked with Coldplay, wowed dance fans with a spectacular audio-visual display on the 6 Music Stage.
Earlier, Malian rockers Songhoy Blues had a late afternoon crowd dancing in unison to African rhythms and heavy blues riffs.
But it was Sheeran's set that proved the highlight for many of the festival's younger attendees.
One fan, Olly Gregson, 18, from Sussex, said: "it was an amazing show, really intimate. Everyone was dancing and singing along. That's the best time I've ever seen him, just because it was so small. You see him in stadiums, arenas and stuff, but it's obviously amazing, the intimacy, so close to it."