text: If the satellite dish is digital (little) then you can plug any old sky digital box into it.  Don't pay the subscription, and you'll get access to all the free channels.  You can get them cheap on ebay/ car boot sales.  If it is an analogue (big) dish, it won't do anything.  Might as well take it off.  Also, you could try a powered TV signal booster on your current aerial.