Didnt know where else to put this soo...
I have had some Vauxhall steels in the past that I have had to use and as you may or may not know the center bore is smaller than on VW's.
I Did do the sensible thing of boring out the center bore so they fit... however, in winter they can rust up and before you know it they are welded to the hub.
So if this happens to you here is the solution.
Get your self a gear puller and a socket the size or bigger for your hub nut. Place the socket onto the hub nut then place a wheel bolt into where a ratchet would normally go in the socket.
Like so...
And arrange the gear puller so that it can grip onto the steel wheel through the holes available. (also see pic)
Now wind it up so that the point of the gear puller sits on the wheel nut you placed in the socket, keep winding and it should pull it off the hub.
NOTE: if it gets stupidly stiff when winding give it a few kicks on the right and left of the wheel. the gear puller may jump off but just follow the instructions and it should come off.
HOPE THIS HELPS