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I use a Freeview TV tuner stick that I plug into the USB port of my computer, It is a Hauppauge make, I then use Windows Media centre to watch and so on. There are quite a few other makes as well. It is not too expensive, works with all my computers and sends TV to disk if required. ITV4 is showing up well on that. I have used similar stuff for more than ten years, also to capture video from webcams and so on. A sharp guy like you should be able to get it going very quickly, you do need an aerial.