From the back of the current catalogue in Victoria. Some reasonable deals for you SIM swappers. You will have to check the providers for full details of GB data allowances. Both of these are 10GB on first activation. Calls and texts in Auz unlimited.
Also listed, but not quite such a good deal, Telstra $40 for $20 (typically includes international to some locations) and Optus $30 for $15 meah on Optus for value and porting experiences.
Store deal only, can't find online.