Energy Bill

I understand those points. Of course, when it comes to the roll-out of smart meters there are a lot of important issues of that kind to determine. In answer to the hon. Member for West Aberdeenshire and Kincardine (Sir Robert Smith), I am advised that approximately 5 per cent. of total meter stock per annum is replaced. I can see where the hon. Gentleman was coming from—there is an ongoing investment and we clearly need to factor that in to any cost-benefit analysis.