I still have all the overseas regions blocked in my 'Excluded Postage Locations' so in theory they cannot buy.

I had another buyer email and ask we I don't post to Victoria and instead of just exempting them from the buyer requirements list thought I would try removing the block but leave the excluded countries - it worked.

Makes you wonder why if we have the 'Excluded Postage Locations' why we need another block for overseas buyers in the 'Buyer Requirements' ?