First off, would be worth asking friends and family (and people on MN) just what sort of costs there are for downloading GB (Gigabytes) of data.
TV (based on my BBC iPlayer downloads) takes about 100 MB per 10 minutes (obviously it varies a bit, but take those as example figures).
There are services offering VPN (virtual networks) which can provide you with a UK address, but obviously if broadcasters find out the IP ranges for these firms, they will be blocked, so perhaps worth only paying for 3 months at a time rather than taking annual contracts.
Do you have anyone in the UK who has broadband? I only ask because a few ISPs don't count the uploaded traffic (they only count downloads) so someone here could run a server, allowing you to pull the programmes you want back to Australia, and I ask about whether someone here could help because on a business travel site, someone wrote:
"I use the fabulous slingbox (www.slingbox.com).
You can buy a slingbox from Dixons, John Lewis, Amazon, etc so is perfectly legal.
It plugs into your home Sky/Cable/TV/whatever and then you can watch this from your laptop anywhere in the world.
I am an expat and have been using it with a Sky+ box in my parents house for the last 4 years (with the equally fabulous "slingcatcher" so I can watch UK TV (including all the sports, movies, etc) on a normal telly."