Thanks, I'll give that hot water treatment a try. I guess I could always just cut through the tyre so it can be pulled off the hub,then glued back up again on the other hub.
Rare wheel Trev. It's a Southern Cross KXD rear wheel. Made by Walter Barr, but were clearly a custom job. Victa wheels will fit but the hub design was completely different. I think Pope will also fit, but were again a different design. Seems like Walter Barr customized the wheels to suit different companies, but basically the wheels and axles were all the same diameter.