Emergencies · UK

Preparing for a power cut

What matters most in a power cut, what official guidance in the UK says, and long-life food that suits it.

By the SupKit teamUpdated 3 min read

The short answer

In a power cut, the things that matter most are torch, spare batteries, charged power bank, battery or wind-up radio. Keep fridge and freezer doors shut during a power cut so they stay cold for several hours.1

What matters most

  • Torch Essential
    A torch for each part of the home you'd need to move around in the dark.
  • Spare batteries
    The right sizes for your torch and radio.
  • Charged power bank
    To keep a phone charged during a power cut.
  • Battery or wind-up radio
    To hear updates if mobile networks are down.
  • Blankets or sleeping bags
    To keep everyone warm if the heating is off.
  • Warm clothing
    Layers, hats and gloves that are easy to find.
  • Manual tin opener
    A tin opener that doesn't need electricity.
  • Some cash
    Card machines and cash points may not work in a power cut.
  • Plan for medication that needs a fridge Essential
    Know how you'd keep it cool during a power cut.
  • Backup plan for powered equipment Essential
    A backup power source or plan for equipment that needs electricity.

What official guidance in the UK says

  • Keep fridge and freezer doors shut during a power cut so they stay cold for several hours.1
  • The Priority Services Register is a free service for people with extra needs (Customer Care Registers in Northern Ireland).1
  • In a national energy shortage, UK power cuts could rotate by area; find your load block letter by postcode at powercut105.com.1

Stay safe

Water and food for a few days

For two adults, SupKit's figures for 3 days are:

3 days
Drinking water18 L
Food energy13,500 calories

Long-life food that suits a power cut

Each of these keeps without a fridge and doesn't need the fridge once opened:

  • Tinned chilli
  • Tinned soup
  • Baked beans
  • Microwave rice pouch
  • Tinned tuna
  • Crackers
  • Peanut butter
  • Dried fruit and nuts
  • Cereal bars
  • Tinned fruit

Allergies, dietary needs and children

Plan around everyone at home: allergies, intolerances and diets come first, and familiar food matters most for children. Recipes vary between brands, so always read the label of the product you buy.

FoodTypical allergensTypically suitable for
Tinned chillivaries by recipecheck the label
Tinned soupvaries by recipevegetarian
Baked beansnone of the main allergens in its main ingredientvegan
Microwave rice pouch 250gnone of the main allergens in its main ingredientvegan
Tinned tunafishcheck the label
Crackerscereals containing glutenvegan
Peanut butterpeanutsvegan, gluten free
Dried fruit and nutstree nutsvegan, gluten free
Cereal barsvaries by recipevegetarian
Tinned fruitnone of the main allergens in its main ingredientvegan, gluten free

Typical allergens and diets are SupKit's guide to the main ingredient, not a product's label.

  • UK food law names 14 major allergens, including cereals containing gluten, milk, eggs, fish, peanuts, tree nuts, soya, sesame, celery, mustard and sulphites.3
  • On pre-packed food in the UK, these allergens must be emphasised in the ingredients list, for example in bold.3
  • 'May contain' warnings aren't a legal requirement, so a missing warning doesn't guarantee a food is free of an allergen.3

Young children

  • The NHS advises not giving whole nuts to children under 5, because they can choke on them.4
  • If allergies run in the family, the NHS suggests talking to a GP or health visitor before introducing nuts.4
  • Babies shouldn't eat much salt, so salty tinned and packet foods aren't suitable for them.4

Questions

What do I need for a power cut?

Torch, Spare batteries, Charged power bank, Battery or wind-up radio, Blankets or sleeping bags, Warm clothing, Manual tin opener, Some cash, Plan for medication that needs a fridge, Backup plan for powered equipment.

How do I stay safe in a power cut?

The NHS lists portable generators among the sources of carbon monoxide poisoning.

Sources

  1. Power cuts, UK Government Be Ready campaign. Checked 28 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  2. Carbon monoxide poisoning, NHS. Checked 28 October 2026.
  3. Food allergy and intolerance advice for consumers, Food Standards Agency (GOV.UK). Checked 28 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  4. Foods to avoid giving babies and young children, NHS. Checked 28 October 2026.

We summarise official guidance in our own words. Always follow advice from your local authorities.

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