This is the 1 I haveIs is something like this? How far are you from transmitter? This one says it has range up to 15 miles.
Would there be many tall buildings etc between you and Three Rock?
I'm abut 12km's from 3 rock. No large buildings around me but there are a lot of trees which means I'm stuck with Virgin for my main TV viewing as Sky could'nt get a dish high enough!