Just a quick bump.
I saw this, having just been looking at the prices of an upgrade on .co.uk.
As i've just moved to Oz i thought i'd have a look at the comparable price.
.co.uk were offering me £155.40 for a 12 month "everything" package (World Premium?) (extended to 13 months as i'm an existing subscriber)
.com.au offered a whopping A$449.50 for a 12 month subscription to their "everything" (World Heritage?) package.
Allowing for an exchange rate of roughly 1.6 - that would make the Oz version £280 ... which is an immense difference for what i think is access to the same info.