Australian/UK immigration question?

Myself and my husband have been married for just over 6 years. He is Australian and I am British. We lived in Britain originally, and then we moved to Australia. We are now talking about going through divorce proceedings as a lot has changed and we are no longer in love. I now feel like my life is in Australia, whereas he feel that his heart is in Britain. (Our marriage wasn't an immigration scam before anyone asks!) If we do go through with our divorce, will he be able to live in Britain and me in Australia or will we be forced to return to our original countries?