There already is the rumblings from the republicans down here to ditch the Queen as our head of state in favour of a "popular" president, inflamed by the independence plebiscite about to be held in Scotland. I'm sure we could still keep the Union Jack on our flag, however I fear the "brand" would be so badly damaged that we would soon see a push for a change to remove the "Jack" from our flag. A flag that Aussies have fought under since Federation. I can't speak on behalf of our cusbro's in Kiwi, but I'm sure they would have some concern about their flag & the state of the union too. Interesting times ahead for the old commonwealth & loyalties.