TY all for the advice, it's very helpful, please keep it coming.
DP has just returned with a copy of ''Living and Working In Australia''
He seems to be pretty serious about this, and once he has an idea in his head he doesn't let go of it.
The more I read up on this, the more I feel but I'm trying to keep an open mind, though it sounds like the opposite of everything I love.
I do think the key to emigrating is going with an open mind, intending to enjoy it and not having a negative attitude that will get the local's backs up.
I know a couple who have moved there 3 times and back again after at most 18 months, they can't seem to stay there. But I suspect that's their problem, they aren't giving it a chance.
It's true that one can always return, and the thought pleases me, however as Ghosty mentioned, perhaps it;s best not to think of it in that way, as you'll spend all of your time counting down the days until you return home and find yourself unable to enjoy life there.
I'll check out the expat forum that was recommended.