Better still, don't allow Sky to put their cabling in - put your own in and do it properly.
oh yes, I am going to get the sparks to connect things for me. My folks had sky installed a few yrs back, and the installer made a real mess of things.
But do use a good quality cable. That means a double screen (copper braid and copper foil) as a minimum. And stick to "full sized" cable which has considerably lower losses than the thin stuff (as you get in the small shotgun twin).
Found some Webpro WF100 cable that should be ok. I had already planed to setup a freeview connection to the multiswitch aswell as Sky. Was thinking about get Virgin cable laid at the same, as I need to have the master socket moved/new line installed. Not sure how that would work tho, as I am leaving VM for Sky. That way, if Sky becomes to expensive, I'll have VM, and FV as a backup. So I will have 3x for Sky+/FV in family room, 1x dining room for FV, each of the 4 bedrooms will have 3x for Sky+/FV.
Indeed, the data network will be as follows: 6x cat6 in family room, 2x cat6 in dining room, each of the 4 bedrooms will have 2x cat6 cables all connected to a switch. Along with 4 telephone sockets in the bedrooms, and 2 telephone sockets in the family room all connected via cat6 cable. It's gonna be a lot of cable.