Billed as a place where left-wing politics and music mix, Bragg explained that it will feature a mix of debates and music collaborations.
The singer-songwriter told Glastonburyfestivals.co.uk he is personally booking many of the acts.
“I’ve started sounding people out [to appear at Leftfield]. Can’t give you any names but I can talk about our format,” he said. “We’ll be kicking off around midday with a couple of debates running until 3pm (GMT) then from 4pm we’ll be inviting three or four artists to come and collaborate with one another in a hootenanny, sitting onstage together swapping songs and playing along with each other, then from 6pm we’ll have bands.”
The final batch of Glastonbury tickets will go on sale on April 11, it was recently announced.