Why was Opeth's set cut short? - Q&A 2

In the second of our monthly Q&A bonus pods, we try to get through as many burning questions as possible. Our biggest triumphs and screw ups? How has Brexit impacted attracting bands? What happens to our festivals if one of us is hit by a bus? Have we ever been held to ransom by a greedy band? And why didn't Opeth play their full set length at ATG last year? We answer them all. We go again, every Thursday morning.