I don't think it's manipulative mate.
The UK ? GBP prices are already published on all versions. I guess given the volatility of the GBP to AUD exchange rate recently, with the AUD a lot weaker, that will make the car landed here more expensive... and build/delivery UK dates are in August/September so the AUD may be even weaker by then!
I guess it's also basic supply and demand... that will of course drive price for a very limited number in OZ.
I would personally be surprised to see the Heritage 90 4 seat wagon at less than $ 70k AUD given it is ? 31K GBP. Time will tell, but they will all get sold FAST, as they did in the UK... 2 days after 'release' they were all pre-ordered!
Cheers,
Pete

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