Organisers of the Bruce Springsteen concert brought to a dramatic early end this weekend have explained the thinking behind their decision.
Springsteen and The E Street Band were performing in Hyde Park as part of the Hard Rock Calling festival (July 14) and was joined by special guest Sir Paul McCartney when the power was pulled on their instruments and microphones after the gig ran over curfew.
Speaking to NME about the action they took, festival promoters Live Nation said: "It was unfortunate that the three-hour plus performance by Bruce Springsteen was stopped right at the very end but the curfew is laid down by the authorities in the interest of the public's health and safety.
Adding: "Road closures around Hyde Park are put in place at specific times to make sure everyone can exit the area in safety."
E Street Band guitarist Steve Van Zandt took exception to the events of Saturday night, writing on Twitter that England had become a 'police state'.
One of the great gigs ever in my opinion. But seriously, when did England become a police state?" he Tweeted.
"We break curfews in every country but only English cops needs to "punish us" by not letting us leave until the entire crowd goes. Is there just too much fun in the world? We would have been off by 11 if we'd done one more. On a Saturday night! Who were we disturbing?"
Adding: "I'm sorry but I have to be honest I'm pissed. Like I said, it didn't ruin the great night. But when I'm jamming with McCartney don't bug me!"
Neither Springsteen nor McCartney have spoken out yet but were spotted eating at a top London restaurant following the concert incident.
Photos: Bruce Springsteen and Sir Paul McCartney in Hyde Park