Travis frontman Fran Healy told the Daily Record: "Beyoncé locked down the entire backstage area for an hour. Everyone was affected.
"You'd ask 'Can I just go there?' and they'd say 'No. You can't cross this little street.'
"Everyone was just following orders from the gang. I guess that's how Americans do it but it's not how we do it in the UK."
He was also critical of the US superstar for being 30 minutes late on stage [uuid=453f2841-dcd9-4f5c-9c8d-6534d2dfb12a]at the end of the night[/uuid].
"She was headlining the main stage and was half an hour late," he continued.
"The whole area was cut off as if there had been a nuclear disaster."