The smell of smoke from the pyrotechnics. Rapturous applause. Crowds that stretched so far back, you couldn’t see everyone from the stage. As the lights went down, one of the singers cried into the microphone: “Thank you Glastonbury, you’ve been amazing!” Back in the Pfizer Chiefs’ trailer, after the biggest show of their lives, a phone rings. “We knew we’d just given our best ever performance, but little did we know what was coming next,” said Alan Wishart, guitarist and band manager.