This discussion is about culture, not passports. Whatever passport WAV holds, he grew up and spent his formative years in Australia and his cultural influences are Australian. WAV, do you have any memories of the first three years of your life you spent in England?

On his return he has attempted to assimilate and become English, but keeps getting this wrong, sometimes comically. WAV, we applaud your efforts to discover your English roots, but please be guided by us natives when you get it wrong.

"Perhaps the term "walkabout" does derive from Aboriginal Australia, but nowadays it's used widely here to describe someone out and about to visit a place and meet folks, yes?"

In UK usage, if we say someone's "gone walkabout" it usually means he's gone missing from somewhere he's supposed to be, for example his place of work. We don't usually use it simply to say that someone's gone travelling.