I have my Virgin Media Hub 3.0 and a TV in my main living room and a separate lounge cabled for a second TV box. In both my living room and the lounge there is white external cable which runs to the TV box but also 2 black cables that look like a TV arial type connection. These are not connected to the TV box in anyway so I would like to remove them. I was out of the country when this was installed and my daughter who was here has no idea what the cables are for. Can anyone advise what these 2 separate black cables will be for?