Band walk off after 20 minutes, but return to complete set
Frontman says the band played within allotted changeover time
Singer's "war" with event's promoters continues
Singer says 'fuck you' to festival chiefs as band make it to Main Stage
Melvin Benn tells NME he thinks the band are 'one of the greatest in the world'
Singer also thanks fans on Twitter
Animosity grows in series of stinging attacks from band
Plus Biffy Clyro, Lostprophets, Mumford & Sons set for event
Frontman made announcement at end of Reading Festival set
Band play on 'acoustically' after sound is cut