Our thermostat is set at 19⁰C, no I don't have a disabled partner. We've had wood burner for 25+ years so it's use is not new. The point I was trying to make, as you asked how to reduce consumption in these temperatures, is there are other ways to reduce consumption. Some examples, you may think me daft, and I could well be, but I believe this has made a contribution. Gas is down by 20% and electric 11% in this house, some things apply to gas, others electric. I tried to find as many small efficiencies as possible which don't directly impact day to day living
Changing clothes less often, we now use the washing machine twice a week - one white and one coloured wash.
Reduce hot water flow to hand hot, no longer adding cold
⅓ fill washing up bowl. Clean down surfaces with this water before washing dishes. Probably saving a minimum of four bowls/day.
Shower every other day
Every door to every room is kept shut
I'm wearing a padded gilet under a heavyish fleece. It's possible all of this is wasted effort but I believe at the very least it is keeping energy use at the front of our minds.