It's a debate going on up and down the country and, in my house at least, has increased in frequency since the clocks changed - is it time to turn the heating on? As someone who works from home full time I spend my life in an Oodie unless I'm on a video call, especially since we got a smart meter this summer with a display that flashes angrily when it thinks we've used too much electricity for the week - usually by about Wednesday.