good moring all

just wondered if anyone knows of a way to get a locking wheel nut off a peugeot 307??

the misses got a puncture last night soi thought it would be a simple case of changing the wheel only to find the last owner hasnt left the locking wheel nut key in the car!

any help would be great or even a garage the would be able to sort in the lechworth,hitchin area!!