Other things we've found useful.
Good old tea lights 😁. I keep some jam jars to put them in on the bathroom & kitchen window sills (no curtains). Also had jar candles to hand.
A few battery push lights can be handy for kids bedrooms, bathroom, hallway.
Rechargeable power banks for phones/tablets.
If bad weather was forecast we'd charge up everything & download films for the kids to watch if the power/internet went down.
We now have a mobile calor gas heater as no longer have an open fire.
Camping stove & Camping oven - both run on those little gas canisters.
Kettle to go on the camping stove.
Dig out your small saucepan to heat milk for coffee & hot chocolate.
Treat box with biscuits, crisps, cake & chocolate. Not a necessity but nice to have if snowed in ☃️.