Let me get this right, I cant receive BTS through youview as I don't live in a infinity area, and I cant receive BTS through BTVision as my local transmitter is only a relay. But isn't BTS fed through your BB line ?
"Requires BT Vision+ box with one off £10 viewing card cost."
Only some non-infinity exchanges have been enabled to carry it over ADSL, there isn't blanket coverage. So this may not be available in your area.