Central heating, on and off again

My brother-in-law came to stay this weekend so in his honour and for his comfort, we turned on the heating for a couple of hours in the morning, and four hours in the evening. And to be honest, it didn't make a lot of difference apart from in the kitchen. And I was a bit shocked to see how much electricity it used as well as burning oil, and although the heaters use quite a lot of electricity too, I don't think that it's as much energy in total as the heating. So it's off again. I think the fact is we live in quite a cold house and we're getting used to it. B-i-l thought it was cold whatever we did, and wore his hat indoors all evening.