Apologies if you already know but I found this and it is epic
1. Visit TVCatchup - Never Miss A Show Again
2. Register it is easy and instant
3. Login and go to the iPhone page which is a neat screen of most free to air channels.
4. At the bottom of the screen push the + button and click 'add to homepage' and add and an icon appears on your iPhone
When you click you have a choice of most uk channels free and live and pausable!
Enjoy if you don't already