Useful advice on sensible actions:
https://www.redcross.org.uk/get-help/prepare-for-emergencies/power-cut
Prepare an emergency kit. An at home kit should include a torch, radio, essential medication, three days' supply of water, ready-to-eat food, a paper copy of emergency contact numbers, a portable phone charger and any pet or baby supplies necessary. Use our emergency kit guide to make your own.