Police are investigating a video clip posted on YouTube which appears to show a motorcyclist driving at 125mph on a motorway. The three-minute film shows other motorists swerving to avoid the car in the outside lane of the M23 in Sussex.

"If identified, strong consideration will be given to prosecution. It was a stupid thing to do," said a spokesman for Sussex Police.

According to YouTube, a successful flagging system lets users alert the website of inappropriate content.

"When a video is flagged, we review it against our terms of use and remove it if the video breaks these standards and suspend the accounts of repeat offenders. If there is any illegal activity taking place or if the police think that a video may be evidence of a crime, then we encourage the police to get in touch with us under the laws the Government introduced for disclosure of data."