Scrap yard will just hit it with a hammer, it's what they do on most that come in, and don't worry about the wheel.

Neil, do you know if it's a Volvo nut? I've got some halfords ones somewhere that look a bit like a castle (as opposed to a McGuard snake type)

Chris thanks to you & the other guys ...

Hi, i ve just broken my locking wheel nut key. Its a four prong type that looks a bit like a round castle turret, the prongs lock into four slots in the wheel bolt part . I think it was an original volvo part circular 1986/87. If anyone has a spare i be happy to buy it of you. Cheers.