The UK Government is encouraging households to prepare for emergencies that could interrupt essential services. While fears of nuclear conflict may attract attention, power cuts, cyber incidents, water shortages and supply-chain failures are among the more practical risks families should consider.
The UK Government has launched a new emergency preparedness campaign encouraging households to keep enough essential supplies for three days, as concerns grow about the potential disruption caused by severe weather, infrastructure failures, cyberattacks and interruptions to everyday services. The advice, announced by the Cabinet Office on 22 October 2026, is intended to help families manage temporary emergencies while support reaches those most in need.
Why is the government asking households to prepare?
The new three-year Be Ready campaign encourages people across the UK to take small, affordable steps to make their households more resilient.
The advice includes keeping a modest supply of drinking water and long-life food, having a torch and battery-powered radio available, and making plans for circumstances in which electricity, communications or water supplies are unavailable.
Security Minister Dan Jarvis said that basic household preparation could help reduce pressure on emergency responders, allowing them to concentrate on people requiring the greatest assistance.
The campaign is not a response to a newly announced national emergency. It builds on government preparedness guidance first introduced in May 2024 and follows similar initiatives in countries including France, Ireland and the Netherlands.
Nevertheless, the announcement raises an important question: what exactly should British households be preparing for?
Is the UK preparing for nuclear war?
The three-day guidance should not be interpreted as evidence that the government expects an imminent nuclear attack.
Britain’s national security planning includes military conflict, terrorism and nuclear risks, alongside natural hazards, accidents and infrastructure failures.
However, the 2026 National Risk Register identifies numerous disruptive scenarios that do not involve war.
These include widespread electricity outages, failures affecting drinking water supplies, severe flooding, pandemics and major digital infrastructure incidents.
The register also considers nuclear miscalculation not involving the UK or its allies, but that is not the same as publishing a probability of a direct nuclear strike on Britain.
For households, many of the consequences of these different emergencies would initially be similar: electricity stops working, water becomes unavailable, communications are disrupted or food deliveries are delayed.
That is why the government’s advice concentrates on preparing for disruption rather than trying to predict one particular disaster.
What are the most likely emergencies?
The government’s National Risk Register examines both the likelihood of serious incidents and their potential consequences.
Importantly, these assessments concern specific national-level reasonable worst-case scenarios, not the probability of an individual household experiencing a minor emergency.
The 2026 assessment includes the following:
| Emergency scenario | Government likelihood assessment |
|---|---|
| Digital resilience failure | 5% to 25% |
| Major water infrastructure failure or loss of drinking water | 5% to 25% |
| National electricity system failure | 1% to 5% |
| Pandemic involving an unknown pathogen | 5% to 25% |
These figures refer to the probability of the defined scenario over a five-year period. Deliberate threats, including cyberattacks, are assessed separately over two years.
They should not be interpreted as annual probabilities or predictions that a particular event is about to occur.
The register also makes an important distinction between the likelihood of an event and its severity.
A nationwide electricity failure, for example, is considered unlikely but potentially catastrophic. A short local power cut is a much more familiar occurrence and would ordinarily have far more limited consequences.
Similarly, an interruption to a local water supply is not equivalent to a major national infrastructure failure.
This distinction matters because practical household planning should reflect realistic everyday risks while providing some protection against more serious events.
Could a cyberattack disrupt everyday life?
Modern Britain depends on interconnected computer systems that manage everything from banking and retail payments to communications, logistics and infrastructure.
A major cyberattack or widespread software failure can therefore affect organisations well beyond the original point of failure.
One recent example of the underlying security challenge emerged on 21 October 2026, when the UK’s National Cyber Security Centre issued an urgent warning about critical PHP vulnerabilities.
PHP is a widely used programming language that powers many websites and online services.
The vulnerabilities, identified as CVE-2026-109618 and CVE-2026-109619, could under certain conditions allow attackers to execute code remotely on affected servers.
The NCSC urged organisations using PHP to apply security updates and assess their systems for potential compromise.
The warning does not establish that the vulnerabilities have caused disruption to the UK’s essential services.
It does, however, illustrate how weaknesses in widely used software can potentially expose large numbers of otherwise unrelated organisations.
The 2026 National Risk Register identifies digital resilience failure as a specific risk, drawing on lessons from the global IT outage of July 2024.
That incident demonstrated how a technical failure affecting shared technology could disrupt services across different sectors.
As businesses become increasingly dependent on digital systems, resilience depends not only on protecting individual organisations but also on understanding the services and suppliers upon which they rely.
Why supply-chain disruption may be a more immediate concern
For many households, one of the most noticeable consequences of an emergency could be disruption to the supply of everyday goods.
Supermarkets rely on distribution centres, electronic ordering systems, payment networks, transport operators and regular deliveries.
An interruption to one part of that system does not necessarily mean food shortages will occur. However, prolonged or widespread failures could affect the availability of certain products.
Consider a possible chain of events:
- A significant cyber incident or technical failure interrupts a major logistics provider’s operations.
- Warehouses experience difficulties processing orders or coordinating deliveries.
- Some retailers receive fewer goods or experience delays replenishing stock.
- Customers encounter temporary shortages of particular products.
This is an illustrative scenario, not a prediction of an impending supply-chain failure.
Similar pressures could arise from severe weather, transport disruption, industrial incidents or problems affecting electricity and fuel distribution.
The National Risk Register specifically recognises reliance on global supply chains as a long-term vulnerability that can worsen the effects of sudden emergencies.
For households, the practical lesson is straightforward: keeping a reasonable supply of essentials can reduce dependence on immediate deliveries or the ability to visit a supermarket during a disruption.
There is no need to stockpile excessive quantities or engage in panic buying.
How one infrastructure failure can affect several services
One of the biggest challenges in emergency planning is the interconnected nature of essential infrastructure.
A significant electricity failure could affect much more than household lighting.
Depending on the duration, location and availability of backup systems, consequences could include:
- Mobile communications and internet connectivity becoming unreliable.
- Electronic payment terminals and cash machines becoming unavailable.
- Fuel pumps being unable to operate.
- Water pumping and wastewater systems experiencing disruption.
- Refrigeration failures affecting food storage.
- Difficulties accessing online information and essential services.
The National Risk Register describes this potential spread of disruption as a cascading effect.
The 2026 assessment also draws on lessons from the major electricity outages experienced across Spain and Portugal in April 2025.
Although the UK’s electricity network is designed with significant resilience measures, the government acknowledges that longer regional or national outages remain possible.
Preparing for a temporary interruption therefore has value even when the chance of a catastrophic failure is relatively low.
What should households keep for three days?
The government’s Be Ready checklist recommends supplies that can help a household remain reasonably self-sufficient during a short emergency.
Drinking water
The latest guidance recommends approximately three litres of drinking water per person per day, with additional water needed for cooking, hygiene, babies, medical requirements and pets.
Food
Keep three days’ worth of non-perishable food that can be eaten without refrigeration or cooking. Suitable examples include ready-to-eat tinned fish, meat, vegetables, dried fruit and nuts.
Remember a manual tin opener if needed.
Lighting and communication
A battery-powered or wind-up torch, spare batteries and a portable radio can provide light and access to information when electricity or internet services are unavailable.
Torches are safer than candles.
Mobile phone charging
A charged power bank can help maintain communication during a short electricity outage.
Medication and medical equipment
Keep essential prescriptions up to date and consider the implications of an extended power cut for equipment that requires electricity.
People dependent on powered medical equipment should discuss suitable backup arrangements with their healthcare provider or equipment supplier.
Cash and important documents
A modest amount of cash may be useful if electronic payments or cash machines are temporarily unavailable.
Keep paper copies of important contact numbers, insurance details and other documents that could be difficult to access without an internet connection.
Warmth and hygiene
Blankets, warm clothing, hand sanitiser, wet wipes and basic first-aid supplies may be valuable during outages affecting heating or water.
Supplies for children and pets
Include any necessary baby formula, nappies, pet food, medicines and other household-specific essentials.
The government stresses that these supplies do not need to be purchased all at once.
Building a small emergency kit gradually during normal shopping trips can make preparation more affordable.
Help is available for vulnerable households
The government is also encouraging eligible households to register for additional support during utility interruptions.
The Priority Services Register allows electricity, gas and water providers to identify customers who may require extra help.
Eligibility can include older people, households with young children, disabled people and those with certain medical requirements.
In Northern Ireland, similar support is available through Customer Care Registers.
Registration is free, although the nature of assistance depends on the provider and circumstances.
Households should not assume registration guarantees an uninterrupted supply.
The government’s campaign also recognises that not everyone can afford to buy extra supplies or make every recommended preparation.
Local communities, neighbours and support organisations have an important role in helping people who may be particularly vulnerable during emergencies.
What should you do before an emergency happens?
Beyond storing essentials, several useful precautions cost nothing.
Write down important telephone numbers, including family contacts and the number for reporting a power cut.
In England, Scotland and Wales, the number for power cuts is 105. In Northern Ireland, the relevant number is 03457 643643.
Check whether your home is at risk of flooding and sign up for relevant warnings.
Make sure household members understand what to do if communications become unavailable, including where to meet if they cannot return home.
Check smoke alarms regularly and understand how to shut off gas, water or electricity safely when necessary.
Finally, consider contacting neighbours who may need assistance, particularly those who live alone or depend on essential equipment.
Useful emergency preparedness resources
The following official and charitable resources provide practical guidance for UK households.
- UK Government Be Ready campaign
The government’s main emergency preparedness website, including its three-day household checklist. - National Risk Register 2026
The government’s assessment of serious national risks, their likelihood and potential consequences, with a shorter introductory guide. - Priority Services Register
Information about registering for additional assistance from utility providers during emergencies. - UK Government Emergency Alerts
Explains how emergency warnings are delivered to compatible mobile phones and what to do if an alert is received. - Met Office weather warnings
Official information about severe weather warnings affecting the UK. - Check for flooding
Flood warnings and local flood information for England, with links to services in the devolved nations. - British Red Cross emergency kit guide
Advice on preparing essential supplies for the home, car and travel. - NHS emergency prescription guidance
Information about accessing urgent supplies of regular medication when a prescription has run out. - National Cyber Security Centre
Cybersecurity advice, security alerts and guidance for individuals and organisations.
During an immediate emergency, always follow instructions from the emergency services and relevant authorities. Call 999 if someone is in immediate danger.
Preparing for disruption, not predicting disaster
The government’s emergency preparedness campaign comes at a time when households and businesses depend on increasingly complex networks of technology, energy, transport and supply chains.
Those systems deliver enormous everyday benefits, but their interconnected nature also means that disruption can sometimes spread beyond its original cause.
Some risks, such as local power cuts and severe weather, are familiar. Others, including national infrastructure failures and serious cyber incidents, require more complex planning because their potential consequences can be much greater.
There is no evidence in the Be Ready announcement that the government is warning of an imminent nuclear conflict or predicting a specific national catastrophe.
Instead, the campaign encourages households to prepare for the common consequences of several different emergencies.
The most useful question is not whether Britain is heading towards a disaster, but whether a household could manage safely if electricity, water, communications or access to essential supplies were interrupted for three days.
A little preparation now could make a considerable difference if that situation ever arises.
Sources
- Cabinet Office, 22 October 2026: Households encouraged to take small, simple steps to stay prepared in an emergency
- UK Parliament, written statement HCWS409, 22 October 2026
- National Risk Register 2026, Cabinet Office
- National Cyber Security Centre, critical security issue affecting PHP, 21 October 2026
- Be Ready checklist, UK Government
- British Red Cross emergency kit guidance
- NHS emergency prescription guidance
