Plus; new albums from Cancer Bats, Matthew E. White, Pearson Sound and Marc Almond
Singer to tour the UK in support of the record
New York duo were told that restaurant giant had no budget for live performers at US festival
Girlpool, Neneh Cherry, Lonelady and Lianne La Havas also confirmed for September event
Mayor Of London describes venues as "teeming wombs of London talent"
Band's Cedric Bixler-Zavala pelted crowd with kettle and jug of water
Buyers will be informed of ticket's face value, seat location and seller's name under new rules