TL;DR
A complete UK 72-hour kit covers nine areas: water, food, light, power/comms, first aid, documents, cash, warmth, and the family plan. Most US prepper kits are wrong for UK households. The full breakdown — what to buy, where, and what to skip — is in the handbook. The free preview below covers Water in full.
72 hrs
UK Gov & EU Civil Protection household baseline
9 sections
What a complete UK household kit covers
~£180
Typical from-scratch UK build cost
Annual
Rotation cadence (suggested: BST start)
Why 72 hours
Three days is the consensus window across UK Government, NHS, EU Civil Protection, and the Met Office. Most localised disruptions in the UK — Storm Arwen, Storm Éowyn, the 2007 floods, the 2019 Whaley Bridge dam incident, regional water main failures — are resolved or substantially recovered within that window for most affected households.
A household that can self-supply for 72 hours becomes invisible to emergency services in the best way: it doesn’t need them. That frees responders to reach people who genuinely can’t cope.
The nine-section kit, at a glance
Most US prepper content over-engineers some of these and ignores others. UK households have a different risk profile and a different legal/retail context. Here’s the structure — with a free deep-dive on Water below, and the rest covered in detail in the handbook.
1. Water
Storage, treatment, boil notices, the 200 L hot-water tank trick most UK households don’t know about. Full preview below.
Free preview below ↓
2. Food (no-cook bias)
3 days × 2,000 kcal × people. UK supermarket buying list. Calories vs convenience trade-offs. What to skip from US MRE marketing.
Read in the handbook →3. Light
Why head-torches not torches. Lithium vs alkaline storage life. Lantern selection. Glow-stick rationale for child stress.
Read in the handbook →4. Power & comms
Power bank sizing. UK-legal radios (PMR446, DAB+). Charging strategy. UK Emergency Alerts system, explained.
Read in the handbook →5. First aid (NHS-aligned)
A genuine NHS-aligned list. Prescription rotation. Paediatric considerations. What “tactical” first aid kits get wrong.
Read in the handbook →6. Documents
The ziplock pack: passport, NHS number, insurance, tenancy, prescriptions, out-of-region contacts. What to photocopy and why.
Read in the handbook →7. Cash
How much, which denominations, why no £50s, when card networks fail (the 2024 CrowdStrike outage as case study).
Read in the handbook →8. Warmth
Foil blankets, sleeping bag selection, camping stove safety. Why CO kills more UK households than any other emergency cause.
Read in the handbook →9. The Family Plan
The bit households skip. Roles, locations, decision points, shut-off locations. Printable templates in the handbook.
Read in the handbook →Free preview — Water
Here’s one of the nine sections in full. The rest of the handbook follows the same depth and citation standard.
How much water
The working figure for a UK 72-hour kit is 4.5 litres per person per day: 1.5 litres for drinking and 3 litres for hygiene and minimal cooking. A family of four needs roughly 54 litres on hand. Bottled spring water from any UK supermarket works; rotate annually.
The 200-litre store you didn’t know about
A typical UK loft cold-water tank holds 200+ litres of usable water. In an emergency that water is drinkable after boiling or chemical treatment. Most UK households don’t know it’s there. The handbook covers identification, access, isolation, and treatment.
Filters
Add one portable water filter (Sawyer Mini or LifeStraw Personal) per adult. These are sub-£25 retail in the UK and treat questionable tap water if a boil-water notice is issued. Filters do not remove chemical contamination. For chemical events you boil; for biological events filters or chlorine work.
One thing not to do
Don’t store water in old fizzy-drink bottles. Residual sugar feeds bacteria. Use new food-grade containers or unopened bottled water rotated annually.
Common UK questions
- Brita filter? For taste, not for contamination. Don’t rely on it during a boil notice.
- Water butt? Garden water is non-potable. Useful for flushing and washing only.
- Where to fill containers? Tap water, refrigerated, rotated annually. Treat as “just in case” not “sterile forever”.
What the handbook adds (that this page doesn’t)
- The full nine-section deep dive — same depth as the water preview, ×8 more sections
- UK retailer sourcing tables — Tesco, Aldi, Argos, Decathlon, with current price ranges
- The UK regional risk map — flood corridors, storm exposure, supply chokepoints
- The Family Plan templates — printable, ready to fill in
- Medical kit decisions — NHS-aligned, no fantasy supplies
- Legal grey areas — multi-tools, knives, generators, water collection
- Annual rotation calendar — what to refresh and when
Frequently asked questions
- Why 72 hours specifically?
- It’s the window where UK Government, EU Civil Protection, and most national emergency services align in their advice. Most localised UK disruptions are resolved within 72 hours.
- Should I just buy a prepacked kit off Amazon?
- Most prepacked “emergency kits” on Amazon are US-spec, oversized, and rarely opened after purchase. Build the kit yourself using the structure above and you’ll spend the same or less and actually know where it is when you need it.
- Is it legal to keep a knife in an emergency kit in the UK?
- A multi-tool with a folding blade under 3 inches (e.g. Victorinox Huntsman) is legal to own and store. Locking blades and longer fixed blades have legal implications for carrying in public; the handbook covers the household exemptions.
- Where do I keep the kit?
- Sealed plastic crate or backpack, accessible in the dark in under 60 seconds. Not the loft. Not the car boot. Under the stairs, in a hallway cupboard, or at the bottom of a wardrobe near the front door.
- How often should I check it?
- Annual rotation. Pick a memorable date — start of British Summer Time is a common choice. The handbook has a full rotation calendar.