hamish225: hmm, seems a bit strange to me that you located the ONT away from where you want your broadband to be provisioned, wouldn't it be easier to just connect said TV to the wifi?
It would be for cable tv (sky or competitor) to plug a set top box into. So they use the (fibre) cable but not the internet to deliver channels.
But don't know if anyone would bother with cable tv here, overseas they seem to be fighting a losing battle with iptv/streaming?