Results of my experiment are in.
So, a random day last week:
Heating was on for 2 hours in morning, 2 hours at night at 18. Did fuck all really, I don’t know why we jothered. It got warm for about 20 mins, then was cold again as soon as it was off. House felt damp all the time. Hallway/kitchen unbearably cold in the evenings.
We had the electric heater on in the lounge in the day, more often than not for me a toddler dd. I wouldn’t bother if it was me, but I can’t have my 2 year old cold all day. Dh working in his office upstairs freezing his arse off. 20 year old son was doing uni work from home in his room wrapped up like a mummy or in the lounge with me and dd (although work in here or she will not leave his laptop alone and he needs to speak). Tumble drier used for one load.
Total gas £3.50 electric £9.86 total £13.36
Yesterday - heating set to 18 all day 7am - 8.30pm. Tumble drier once, no electric heater used at all, not needed. Everyone comfortable all over the house. The warmth seemed to stay over night. That awful damp feeling gone from the air.
Total gas £6.38, electric £4.66 total £11.04