Altogether not a bad idea. It could use some work and it's most certainly something I've always enjoyed.
I wonder, do brits say "good day" as well as australians, or is that almost exclusively an aussie thing? I'm sure I've heard some brit somewhere say it. I imagine if they do, they'd enunciate it more.
I really, legitimately can speak in british tones quite well if I do say so myself. I suppose a true brit would need to judge it, but I rather think it's very well-done. I'm not usually the type to toot my own horn, either.