Nice thought! It's 3 upgrade credits of 25,000 points - have a look at the
Upgrade Table for more information.
Living in BNE, where there's no direct BNE-LHR flight, makes it a bit harder to organise an upgrade all the way through if you're waitlisting.
If you're on a single OZ-UK flight number eg QF1/31/9, then you might have more luck upgrading all the way through if you waitlist.