I wholeheartedly agree with the principle of trying to reduce our energy consumption particularly for those who are reasonably mobile, fit and well.
While we do not all want to look like grannies huddled over our single bar fire in blankets and shawls, it is sad that for those who need help most, it is often hardest to access.
Heated throws for those who cannot move about much, hot water bottles and bedsocks (I love mine!) and warm pj’s, thermal underwear, wear an extra layer, that’s why God invented cardis , wear wool instead of synthetics (which do not keep you warm) , a hot lunch - eg soup, keeping a thermos of boiling water/tea or coffee instead of boiling the kettle every time, cutting down on heating underused parts of the house (but maintain ventilation to reduce the risk of damp) drawing the curtains at dusk - even with double glazing it can make a difference - and if your heating is on a timer, have it go off an hour earlier (and have an early night) and set it to come on a bit later., turn lights off when you leave a room but don’t skimp on potentially dangerous areas like stairs, and if you have a draughty front door, try a curtain behind it- remember those heavy curtains on a pole which went up and back when you opened the door?
We have most of us become accustomed to a higher ambient temperature in our homes and while I am not advocating this for the very young or the very old, I think back to the early months of our marriage when we had a coin in the slot meter and I was horrified at how much it cost to boil a kettle or use the iron.
If all else fails
“Throw another dog on the bed”.