sound like someone along the lines has used your locking nut with an impact gun
is it driveable as when i lost my locking socket i went to a tyre place and they just removed all my locking nuts for me, i went to plume tyres but i think there only a small company and won't have one up your way,i did try to remove them myself with locking nut removers from halfrauds but my alloy have really deep bolt holes and i couldn't get the removers in the hole to get at the nuts
