In 1976, the Stones pulled a vast crowd to Knebworth. It was a day of surprises, not least how late everything ran. In 2007, Classic Rock delivered this eye witness account
““We were supposed to finish by midnight,” Bannister remembers, “and it eventually ended at about 2am, I think David (now Lord) Cobbold, who held the licence, got fined £2,000.” As The Who’s Baba O’Riley provided the triumphal soundtrack to our first stumble into an unlit ditch, we staggered off into the breaking dawn. It took four hours to find the car, but as we’d just seen Keith Richards smoking a cigarette, we didn’t mind a bit.”
Source: What happened when The Rolling Stones and Lynyrd Skynyrd played Knebworth | Louder