you can get a uk ip for free using expat shield. It's a free virtual private network
http://expatshield.com/I've tried it and it does work / change your IP and will give you access to iplayer, itv player etc. You can also watch live uk tv on tvcatchup.com
For just about anything to do with sport (and some tv) then I'd look at myp2p.eu (that's the full URL)
A cautionary note:
Needless to say that if you mask your IP address you will be in breach of your contract with your ISP. Also if you access BBC etc by masking your IP you are in breach of their worldwide copyright - this is why BBC is only available in the UK over the internet. And, as far as I know, most of what is on myp2p is technically copyright protected
However, I am yet to find anyone actually taken to task over this.
Finally, I am not recommending anything here, just stating a few facts
If the mods think this post is without the posting guidelines then please feel free to remove. I have no vested interest - I just don't like to see people spend their hard earned needlessly!