Rock stars Bruce Springsteen and Sir Paul McCartney had the plug pulled on them after over-running at a concert in London's Hyde Park.

Headline act Springsteen welcomed Sir Paul on stage for renditions of the Beatles' I Saw Her Standing There and Twist and Shout.

But their microphones were turned off before they could thank the crowds.

Springsteen had exceeded the time limit for the Hard Rock Calling event after playing for more than three hours.

"It made for a slightly bizarre, anti-climactic end to what had been a fantastic show," said Stephen Robb, a BBC reporter who was at the event.