The 23-year-old singer surprised fans by appearing on the Pyramid Stage last night (27.06.14) during the dance act's set to perform 'Bloodstream' - a track they wrote together for Ed's latest album 'x'.
Ed was introduced by the group's DJ Locksmith as their ''brother from another mother'', who entertained the audience by jumping onto a security guards back during the performance.
The 'A Team' singer sang and played his acoustic guitar and kept chat to a minimum shouting ''make some noise for Rudimental'' at the end of the track.
Unfortunately for punters, Rudimental's set was cut short not long after Ed's appearance due to an approaching thunderstorm.
Instead of broadcasting footage of the performance, the screens at the side of stage showed a warning message, ''Due to weather conditions we may need to power down briefly'', before a festival representative came out to inform the crowd the stage was being closed.
Despite the set being cut-short, the band - made up of Amir Amor, Kesi Dryden, Piers Agget and DJ Locksmith - were clearly enjoying their time at the iconic Worthy Farm festival - at which revellers have been enjoying EE's bespoke 4G network via the 'Highspeed Herd' signal providing cows.
DJ Locksmith said: ''Tell you what, there's something special about this place. Am I right or am I right.''
Meanwhile, Ed's weekend isn't over yet - he'll also be playing a set on the Pyramid Stage on Sunday evening (29.06.14).
Many ticket-holders couldn't get into the O2 Arena show on Tuesday night (September 19th) because they didn't bring photo ID to match their booking.
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