I was trying to hold out till the end of the month. Last night was defeat. Thirteen degrees in the kitchen.
I work from home, but never have the heating on during the day (goes off between 8.30 and 5pm), but my office is on the second floor of a tall, thin house, so all the heat rises and makes itself at home in my office. If I make the mistake of turning on the thermostat in my office, it rapidly gets warm enough in there to roast a chicken.
Interestingly, I discovered last winter that we have the coldest house on our street. When it snowed, it melted on all the roofs (of twelve identical houses) other than our house. We had a nice thick blanket of snow. Which froze. And the fell off one night, taking all our gutters with it.