You can prove you are the owner of the vehicle,right?
Then no worries really.
You,ll have to get the car thru the UK MOT test,for safety,change the speedo reading,either with a sticky label or buy a new speedo.
You,ll lose the aussie reg number and get,what we call,an age related number.
just get it here and log on to www.DVLA.gov.org
Or do a Google search for DVLA.
OR
Sell yours and buy my show winner,when you get here :)
RALPH.