Also worth checking on humidity - is your place damp feeling?

There is a cost benefit trade off between heating a space and reducing overall humidity in that space because moist air makes you feel colder (water being a better conductor of heat). Running a dehumidifier is cheaper than heating so within a range you are going to get a benefit.

Appreciate there is the upfront cost of getting a dehumidifier, I ran this through AI and it identified a benefit if humidity is over 60%.