I try to manage my electricity usage.
We have solar panels on the roof of our house, in full sun generating about 4kw.
In the dull dark winter though next to nothing.
Undeterred, i turn the temp down to about 25°C when we are not using it, then a day before we want it, i turn i back up again, allowing the free electricity from the Solar PV's to partly fund the reheat.
Not sure if it works, but makes me feel better.
I'm expecting that the UK will get a taste of what you guys in the northern states have been seeing.
This is when it will hurt the most.