Reznor accused them of being responsible for ruining preparations for NIN's performance at the festival last month, saying: "Should be an unusual show tonight� the lying promoter and the band following us (whoever the f**k they are) f**ked us on our production."

Biffy frontman Simon Neil says: "I was dying to tweet back to him all day � but we just wanted to focus on our show," he said. "We thought, 'Well, you might not know who we are now, but I guarantee by the end of today you'll know exactly who we are.'