Re: It'll only work when ...
@Simon Hobson.
I know this is what the government thinks will happen. But, if they really believe they can implement any form of remote power cut and get the population to accept it, they're dreaming. Yes, it happened in the 70s, but people are vastly different now. Rolling power cuts of any type simply won't be accepted. And, if they really think people will allow them to turn devices on and off in the home, they are equally deluded. People want to use appliances when they want to use them. Yes, it will work for some heating (economy 7 effectively), but there was already a method for that. Doesn't need smart meters. The majority of household consumption is actually non-neogtiable. People don't make a cup of tea when the government or demand says, they make it when they're thirsty. People don't watch telly when the government says, but when there programs are on, or they have time. Maybe some kitchen appliances might be possible, such as washing machines, tumble driers and dishwashers, but that's possible now using a simple timer.
In reality, this is not practical in some cases anyway. If you have a seperate washing machine and tumble drier (more efficient that a combined device), how do you get the washing from one to the other in the middle of the night whilst you're asleep?
The government are absolutely bonkers if they think they will be able to dictate this without widespread public disorder. And, if they think people will believe wind power is working when this is going on, they're even more mad.