I've got the basics in, water, torches, a few extra tins. I've also got a few bits which could be useful such as dry shampoo, and bathroom cleaning wipes and paper plates for if there is no water. I have some battery powered fairy lights to weave through the stair banisters so overnight the steps are dimly light. I have some cheap garden solar lights.
Onesies are a bit passe now but I've kept mine because I was always sweltering in it so if we lose heating it'll be great.
I thought we could share some less well known ideas?