Do you speak English? Do you know a passable amount about the UK? You should test your suitability for life in the UK with their Citizenship Test, via The Guardian:
20. When was the census first carried out in the United Kingdom?
Also, “Why were recruitment centres set up in the West Indies in the 1950s?” and “In which year did married women get the right to divorce their husband?”
If you can’t answer such basic, everyday questions, then “you have insufficient knowledge of the English language or of life in the UK to remain”. Get out, foreigner what speaks bad English.
Clearly, we need something equivalent here.
Suggest your equally reasonable Australian Citizenship Test questions in the comments.