Watch man try to steal Porsche by cutting a hole in the roof

The Metropolitan Police have released footage of the world's least stealthy criminal attempting to steal a Porsche parked in London's Mayfair.

The crook cut a hole in the soft top and climbed in, before attempting to start the car from the driver's seat.

He then discovered that he couldn't start the vehicle and jumped out again, setting the alarm off in the process.

Police are appealing for anyone who recognises the thief to call Crimestoppers.