Emergency food preparedness: a UK food supply you would actually eat

Written by James Frost, founder of Flaming Phoenix. Updated October 2026.

In the UK, emergency food preparedness means keeping three days of no-cook food per person, about 6,000 to 7,500 calories for an adult, plus 7.5 to 9 litres of drinking water. Tins with a tin opener, oatcakes, nut butter, nuts and dense bars cover it without a fridge or a cooker.

The government's Prepare campaign asks households to keep supplies for "an emergency lasting a few days", and the British Red Cross suggests three days of bottled water and long-life, ready-to-eat food. The calorie range comes from the NHS figures of about 2,000 a day for women and 2,500 for men.

None of this needs a bunker or a year of freeze-dried tins. Most UK emergencies are short. When Storm Arwen cut power to nearly a million homes in November 2021, Ofgem's review found 82% were reconnected within 24 hours, although nearly 4,000 homes went without power for over a week. A few days of food you would happily eat anyway covers almost everyone.

What does the UK government advise you to store for emergencies?

The UK government advises storing bottled water and non-perishable food that needs no cooking, such as ready-to-eat tinned meat, fruit or vegetables, with a tin opener, alongside a torch, radio and power bank.

The Prepare campaign's kit list, grouped:

• Water: at least 2.5 to 3 litres of drinking water per person per day, the World Health Organisation's survival minimum; about 10 litres per person per day makes basic cooking and washing comfortable.
• Food: non-perishable, no-cook food in whatever amount suits your household, plus pet food and ready-to-feed baby formula if you need them.
• Light and news: a battery or wind-up torch ("torches are safer than candles") and a battery or wind-up radio, with spare batteries.
• Power and health: a portable power bank, a first aid kit, any medication, hand sanitiser and wet wipes.

For power cuts specifically, the government's power cuts page adds two practical steps: save the number 105 to report a cut (03457 643643 in Northern Ireland), and, if anyone in your home has additional needs, join your network operator's free Priority Services Register.

How much food do you need for a 3-day emergency supply?

An adult needs about 6,000 to 7,500 calories of food for three days, based on the NHS figures of 2,000 a day for women and 2,500 for men; two adults need about 13,500.

Here is one way to reach that for one adult using only UK supermarket food that needs no cooking. Calories are worked out from McCance and Widdowson's UK food tables:

• Oatcakes, 300g: 1,359 calories.
• Smooth peanut butter, 200g: 1,214 calories.
• Sardines in oil, 180g drained (two small tins): 396 calories.
• Corned beef, one 340g tin: 697 calories.
• Baked beans, two 400g tins, eaten cold if need be: 648 calories.
• Fruit cocktail in juice, two 400g tins: 360 calories, and the juice counts as fluid.
• Salted peanuts, 200g: 1,204 calories.
• Milk chocolate, 100g: 519 calories.
• Two shop-bought flapjacks, 180g: 781 calories.

Total: 7,178 calories, about 2,400 a day, in roughly 3.1kg of food before tins and packaging. It fits on one cupboard shelf, costs little, and every item is something most people eat anyway, which makes rotating it easy. Add the water: 7.5 to 9 litres per person at the survival minimum.

The calories per gram matter less at home than in a bag. Tins are heavy for what they give (baked beans carry 0.8 calories per gram), but they hold fluid and keep for a long time. Density only becomes important when the food has to be carried.

The grab bag or car kit

For a bag you might have to carry, or a kit that lives in the car, aim for a day of food in about 500g.

• Two Phoenix Bars, 240g: up to 1,114 calories, eaten as they are or stirred into hot water as a porridge if you have a kettle or stove.
• Salted peanuts, 150g: 903 calories.
• Milk chocolate, 100g: 519 calories.

That is about 2,500 calories in 490g, roughly one adult's day, with no cooking, cutlery or water needed to eat it. Any dense, no-cook food works the same way: nuts, oatcakes, flapjack, high calorie bars. The British Red Cross car-kit list includes "bottled water and non-perishable snacks", alongside a blanket, torch and ice scraper.

Cars get hot in summer and cold in winter, so check car-kit food every few months and replace it well before its date.

What are emergency rations, and are they worth buying?

Emergency rations are compressed, long-life food bars or biscuits made to keep for years; a 500g Seven Oceans pack, for example, holds about 2,500 calories and keeps for up to five years.

Their strengths are real: about 5 calories per gram, no cooking, no water needed to eat them, and a shelf life of up to five years from production according to the listing we checked. They are designed for grab bags and survival kits, where food has to sit untouched for years and then work first time.

The trade-off is that they are made to keep you going, not to be enjoyed. Most people would not choose to eat them on an ordinary day, which makes them hard to rotate, and in a stressful situation food that is unpleasant tends to get left. For a home supply, I would keep a pack or two in the grab bag and build the rest from food you already like.

Emergency food kits

Ready-made emergency food kits sold by UK prepper shops range from single-person 72-hour boxes to months of freeze-dried tins. Before buying one, divide the total calories on the label by the number of days claimed, and check whether the meals need hot water. A "3-day kit" that supplies 1,200 calories a day is a different thing from one that supplies 2,400.

High calorie emergency food

If space is the limit, choose food above about 4 calories per gram that needs no preparation: nuts (6.0 for salted peanuts), oatcakes (4.5), flapjack (4.3), chocolate (5.2), and dense bars at 4.3 to 4.6. Our guide to calorie-dense foods ranks more of them.

Which emergency foods last longest?

Freeze-dried tins last longest, sold with shelf lives of up to 25 years, then emergency ration bars at up to five; tinned food, ration packs and dense bars sit around one to a few years.

• Freeze-dried meals in tins: up to 25 years, according to sellers such as ReadyWise, but every meal needs hot water. Freeze-dried meals are excellent if you have a gas hob or camping stove; in an evacuation you may not.
• Emergency ration bars: up to five years, ready to eat.
• Military ration packs: the MOD requires at least 24 months of shelf life to remain when packs are delivered into its supply chain; our guide to army ration packs covers what is inside and where to buy them.
• Tinned food: check the best-before date on each tin and rotate.
• Phoenix Bars: up to two years (12 months for Cherry Bakewell). That is shorter than the specialist options, so they suit a supply you check and rotate, not one you forget about.

For a side-by-side of freeze-dried buckets, ration packs, biscuit rations and pantry staples, see our guide to survival food in the UK.

Food that keeps for 25 years but tastes like cardboard often gets forgotten and thrown away. Food you like gets eaten and replaced, which is the whole point of a supply.

Emergency food for families with children

For children, the best emergency food is food they already know and eat happily on a normal day, because an emergency is a bad time to introduce anything new.

Include their usual cereal bars, crackers, dried fruit and tinned fruit, and something warm if you have a way to boil water: instant porridge goes down well at a stressful time. If you have a baby, the Prepare campaign advises keeping ready-to-feed formula, and the Food Standards Agency says to use ready-to-use formula if you cannot boil water.

How do you rotate an emergency food supply?

Rotate an emergency food supply by checking it every three months, eating anything within a few months of its date in everyday meals, and replacing it with fresh stock at the back.

The biggest problem with emergency food is not building the supply; it is remembering it exists. First in, first out solves that. When you add new stock, move the oldest to the front and use it: the tins for a lazy dinner, the nuts and bars on a walk or during long shifts, the oatcakes with lunch.

Set a calendar reminder for every three months. Open the cupboard, check the dates, use what is close, restock. It takes about ten minutes, four times a year, and with food that keeps for a year or two nothing should ever reach its date.

What about longer-term preparedness?

For anything longer than a few days, scale the same plan up with cupboard staples and make water storage your first priority.

For a week, multiply the three-day list by two and a third and add more tins, rice and pasta if you have a way to cook. Beyond that you are into ordinary pantry planning: dried staples, tinned food and a proper water store. The government's figure of about 10 litres per person per day for drinking, basic cooking and washing adds up quickly, at 70 litres per person for a week, so water, not food, is usually what limits a longer supply.

A warm meal makes a long disruption much easier to live with. If you have a gas hob or a camping stove that the manufacturer says is safe to use indoors, porridge, noodles and freeze-dried meals all become options; the Food Standards Agency warns that most camping stoves and barbecues are designed for outdoor use only.

Common questions about emergency food

What should you eat first in a power cut?

Eat chilled food first, then defrosted food that needs no cooking, then perishable food kept at room temperature, and only then the tinned, bottled and dried food in your supply. That order comes from the Food Standards Agency, which says a fridge stays cold for up to 4 hours and a full freezer for up to 48 (24 if half full) with the doors kept shut.

Can I just buy supermarket food for emergencies?

Yes, and for a home supply it is the best option. Tinned fish and meat, beans, tinned fruit, oatcakes, crackers, nut butter, nuts and UHT milk cover most needs for little money, as the three-day list above shows. Supermarket food only falls short for a grab bag or car kit, where weight and space matter; there, compact, calorie-dense options that need no preparation work better.

Should I buy military ration packs?

They work, but they are expensive for home storage. A British Army 24-hour pack holds around 4,000 calories, more than most people need while sitting out a power cut, and its main meals are heavy wet pouches. One or two make a good addition to a cupboard supply; a week's worth for a family costs several hundred pounds. Our guide to army ration packs lists the current menus.

What about freeze-dried meals?

They are light and keep for years, and many taste good, but every meal needs hot water. In a power cut you may still have a gas hob; in an evacuation you may not. Build the core of your supply around food that needs no water or preparation, and treat freeze-dried meals as an extra for when you can boil a kettle.

I live in a flat with limited storage. What is the minimum kit?

For one person for three days: 9 litres of bottled water, about 7,500 calories of no-cook food (the grab-bag list above three times over weighs about 1.5kg), a torch, a radio and a power bank. That fits in one box under a bed. It is not everything, but it covers the short disruptions that are by far the most common in the UK.

Sources: UK government, Prepare: get prepared for emergencies; Prepare: power cuts; Food Standards Agency, food safety in a power cut; British Red Cross, prepare an emergency kit; NHS, understanding calories; Ofgem, Storm Arwen review; CoFID 2021; Seven Oceans and ReadyWise product listings, checked October 2026.