[Horizon]

... If you were to go into a price comparison site and find that VM services are £5-£15 cheaper with calls going over the net and no line rental, would you stick with BT, Sky, whoever you're currently with? I wouldn't.

I agree, line rental is a money maker for VM, "money for old rope" comes to mind, or should that be money for old copper.... But, and it is but, VM gain a lot of extra customers saving that £5 or whatever it would be and that would offset the lost revenue from axing line rental and the old copper telephone network.

BT can't offset line rental, that's a significant part of their business and at the moment, they don't have cable tv network to fall back on either.