For the benefit of overseas readers Total Control is an tariff from suppliers that uses off-peak power to heat your home and water.
"You'll get between five and twelve hours a day from your storage heating. We find out the best times to put it on for you by regularly checking the weather forecast. This means that you’ll have heat when you need it most, without having to worry."
The reality is that they can dump excess power into your house when you don't need it and make you pay for it!
With smart meters the suppliers will be able to cut you off as well. This won't affect me as my tinfoil hat has a woolly lining.