Hi - My locking wheel nut key/socket broke whilst trying to undo an over tightened nut. I've removed locking wheel nuts in the past with sockets but... these ones have rotating shrouds on them. (VW Sport Rader)

Can any one advise me on how to remove them.

Any help would be much appreciated - - Cheers guys!

(I'm not a mechanic or anything, so dont have things like mig welders.. local tyre bay suggested fusing the shroud and nut together... but easier said than done)