HWB if you have the means to heat extra water (beyond what's needed for tea/coffee and washing purposes).
We have lots of blankets, throws, fleeces that are on the backs of chairs or scattered in bedrooms. We often snuggle under them in the evenings anyway, but when we had bad snows, we organised ourselves to mostly live in 2 rooms downstairs, closing off those to the rest of the house during the day until close to bedtime to keep the heat in, and bringing lots of blankets into those rooms.
Have a radio operated by batteries or that winds up.
Power banks for phones especially, but also iPads etc if you have plenty. And spare batteries for torches, radio etc.
I also have a solar panel for camping so can recharge the power banks at least somewhat in the daytime.
Other than torches, or camping lanterns, a few candles and somewhere safe to have them lighting are useful. So nightlights in glass jam jars would work, but basically protect against getting blown out or, more importantly, knocked over.
Food and drinks that are comforting but don't need much cooking - tins of soup, dehydrated soup, hot choc made on water, hot squash, super noodle type pots, etc.
And entertainment that doesn't need power - pack of cards, board games, jug saws, books, puzzles, crafts etc. You don't need to keep all these in an emergency kit, just know where to find them when you want them.