My sky box is playing up and I am going to replace. I am inclined to replace with a sky hd box which I understand has sky plus incorporated. Here are my questions, my tv is positioned on an internal wall and I only have room at the moment in the trunking for the telestrial cable (need to keep for freeview) and the single current sky cable: the sky plus has two cables, can I operate normal SD sky and HD from just one cable feed?. I assume I do not have to subscribe to sky hd even if I get them to install the box as I would like to see the quality of hd first on bbc freesat (which is one payment only. Your views would be appreciated.