A few other things to note...
* Access to television broadcasts in Australia is generally done either via terrestrial broadcasts (called "Freeview", same as UK) or for pay-TV via Foxtel via a mixture of cable & satellite. Other than Foxtel, satellite TV reception is generally limited to those wanting to watch ethnic or religious programming (with odd exceptions) and those in areas where no terrestrial TV signal is available.
* To serve those areas where no (reliable) terrestrial TV coverage exists, there is a satellite delivered system called VAST (
Viewer Access Satellite Television). It's a free-to-view system which is restricted to a few special receivers and uses Irdeto CA. While the ABC & SBS programming on VAST is available to anyone in Australia, commercial broadcasts are restricted depending on postcode/region. Your Humax Freesat receiver won't be compatible with VAST.
* The vast majority of domestic Ku Band satellite dishes in Australia will be pointing at 156E which is home to both Foxtel & VAST, with only a few FTA broadcasts available at that position. To add to what
@moonbase mentioned, 152E, 160E & 166E are other locations where English language Ku Band material can be received - in the far north of Queensland & Northern Territory reception from beams aimed at Indonesia & Papua New Guinea may be possible while Canal + also provide a French-language aimed service at 180E (essentially it's an "overspill" service from transmissions primarily aimed at New Caledonia that is offered to Australian based Francophones in central & eastern states).
* The ABC, SBS (both at 160E) and the Nine Network (166E) use satellites to distribute material to their transmitters & their regional affiliates - however they use 16APSK with a high FEC which means that a high SNR is required for reliable reception as well as the use of multistream transmission. From reading elsewhere, a minimum dish size of 1.8 metres is required for general "reliable" reception, unlikely to be worth it unless you're really in outback Australia and want "direct" metropolitan programming or you wish to view out-of-state broadcasts.
Overall, you may as well leave the Hummy in the UK IMO.