British civilians and businesses would be asked to “do their bit” and make sacrifices to help defend the UK in the event of a full-scale military conflict, under plans being discussed in Whitehall to prepare the country for war.

The head of the Armed Forces, Gen Sir Rich Knighton, revealed earlier this month that the Government is to revive the blueprint for Britain’s preparation for a conflict that directly threatened the country, known as the War Book.

The framework, which was last updated during the Cold War but cancelled more than 20 years ago, is being updated for the modern era and is expected to include measures to prevent an adversary such as Russia from cutting internet and communication access for Britons or flooding social media with propaganda designed to destabilise the population on the outbreak of war.

Separately, ministers are considering commissioning a booklet for ordinary households and businesses, similar to those published in Sweden and Taiwan, for how they should prepare for war, it is understood.

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Not all walks are
created equal

Read on to find out how to supercharge yours into an unbeatable health-builder

How to supercharge your walk

Get a bit breathless

All walking paces are linked with a lower risk of cardiovascular disease but there are additional gains made by those who walk at a moderate-to-vigorous intensity.

Walk uphill

Try to find varying inclines to increase energy and muscle burn.

Add weights

The extra resistance challenges your heart to work harder, increasing cardiovascular fitness.

How to supercharge your walk

Uneven ground

Mountainous and uneven terrain work your stabilising muscles harder, increasing the difficulty and output from your walk.

Go Nordic

Using poles engages the arms as well as the legs and core, turning walking into a full-body workout.

A walk is beneficial at any time of day, but after eating could be best. Research has found that 10- to 30-minute walks taken 10 to 30 minutes after a meal can reduce the peak blood-sugar measurements reached.

Slower and lower blood sugar throughout the day reduces the risk of type 2 diabetes and cardiovascular disease.

How to supercharge your walk

Go green

Walking in nature has more psychological benefits than concrete. It’s shown to significantly reduce anxiety and depression.

Improve your posture

Staying tall through the spine, open your chest and keep your eyes forward (not leaning over on your phone..). 

Meet outside

Walking is a good time to have conversations, whether with your boss or a friend.

Mistakes to avoid

1Focusing on step count – most research suggests that benefits plateau at 7,000 steps a day.

2Using ankle weights – they can tug at the hip flexors and the knees.

3 Doing one-and-done – just hiking for three hours on the weekend, and nothing throughout the week, means you’re missing out on benefits.

4Thinking it’s not a workout – walking packs in cardio and brain-boosting effects without the recovery time of intense exercise.

Eight million people in the UK are living with heart or circulatory disease

And while chest pain is a well-known symptom, there are more subtle signs you should be aware of too.

Overlooked signs of heart disease

Dizziness and fainting

An abnormal heart rhythm can cause a dizzy feeling. While much dizziness is not serious, it can be associated with life-threatening complications. 

Increased breathlessness

This breathlessness could be due to blockages and reduced blood flow in the arteries.

Swollen ankles

Unusual swelling can indicate a problem with the body’s circulatory system and kidneys.

Worsening fatigue

Ongoing and worsening fatigue can indicate an underlying health issue, and it could be a sign that your heart isn’t working as effectively as it should be. If persistent fatigue is impacting you day-to-day, the best thing to do is speak with your doctor.

Ruth Goss, senior cardiac nurse at the British Heart Foundation

Overlooked signs of heart disease

Indigestion-type symptoms
Discomfort in the stomach, chest and ribs, or a burning sensation in the chest area, could all be symptoms of heart disease.

Erectile dysfunction
If it’s an ongoing issue, there could be an underlying health problem, including atherosclerosis (narrowing of the arteries), diabetes or high blood pressure.

Emotional detachment is a key life skill

Read on to find out how to embrace it, from GP Dr Radha

Healthy detachment

[Detachment] is not selfish – we can still care and empathise. We don’t avoid, we just balance and respond rather than react because we are not too invested in the outcome. This is very different from emotional numbing, which often happens after trauma.

dr Radha Modgil

When we need detachment

Toxic friendships

When you feel that an interaction brings out the worst in you, or that you are having to watch everything you say or do.

Dysfunctional families

Healthy detachment is helpful when we become overly invested in trying to control or fix someone.

Work issues

It’s helpful in situations you are not in control of and helps you leave work behind at 5pm. 

How to start it

Examine your beliefs

You may have been conditioned to think that it is your responsibility to fix everything. Is this a fact or based on old patterns?

Look at the impact

Consider what negative impact your “fixing” has; it can keep situations stuck, or infantilise others from growing up.

Which problems are in your control?

Understanding what problems are ours to hold and which aren’t can help avoid emotional burnout.

How to maintain it

Firm boundaries

This means understanding your sense of self, what is yours and what is not and sticking to it.

Self-care

Recognise and look after your own energy levels, mental health and your need to live your own life.

Be objective

Try to have a factual, calm, rational attitude in moments of conflict. This includes trying to release the need to control.

I spent a week in the world’s happiest country

Here are the five ways I
brought Finnish culture back to the UK.

Sauna, sauna, sauna

A regular Finnish sauna boasts a wealth of health benefits: improved cardiovascular health, reduced blood pressure, lower risk of heart disease, stroke and dementia.

In Finnish culture, the sauna is available for everyone: it’s the great equaliser and forms a gently ritualistic part of the day.

Immerse yourself in nature

It is enshrined in Finnish law that anyone living in or visiting Finland has the freedom to roam the countryside, forage, fish, ski, or camp temporarily.

70 per cent of Finland is forest and they have an estimated 180,000 lakes, of which Lake Saimaa (the one I visited) is the largest.

It plays into the Finns’ love of solitude: having space to think. I have found myself not only treasuring the greenery I can find in London.

Eastl local and drink coffee

Finnish diet

Diets are rich in oily fish and local produce: whole grains, Arctic berries, dairy, wild mushrooms, and game like reindeer.

Coffee

The Finns are the number one coffee drinkers in the world. This is both a social ritual and a historic legacy.

I’m cherishing my coffee breaks that bit more, as well as enjoying smoked fish and pickles for lunch

Have fun

Play is embedded from early childhood, as it is seen as a fundamental pillar of development. For every 45-minute lesson, children enjoy unstructured play for 15 mins.

While adults don’t get the same level of structured play, hobbies and a clear demarcation between work and life ensure adults retain a sense of leisure. Every year in July, businesses slow down.

Do not take the good for granted

Finns actively remember not only their suffering through the war, but the fact that the peace they enjoy requires constant maintenance.

People walk in Greenwich Park in London, with the backdrop of the Royal Observatory, Monday, Sept. 22, 2025. (AP Photo/Joanna Chan)Greenwich Park (Photo: AP Photo/Joanna Chan)

Since my visit, I am actively appreciating things like London’s public transport system, or the number of parks my dog can run in. We are fools if we take it for granted.

Inflammation can be harmful.
But it is possible to lower it through lifestyle changes.

We asked the experts the habits you can instill to reduce levels.

Dietary changes

Fruit and veg

Research suggests high intakes of fruit and vegetables are linked with lower inflammatory markers, says dietitican Sammie Gill. 

Healthy fats

Omega-3 fatty acids from oily fish, nuts, seeds and olive oil are all beneficial in fighting inflammation. 

Established diets

Certain patterns, like the Mediterranean diet, can help control long-term inflammation. 

What to use and what to avoid

Use turmeric and black pepper

Herbs and spices are an easy way of adding anti-inflammatory plant compounds to your diet.

Drink green tea

Keeping hydrated by drinking enough water helps your body function, and herbal teas can have added benefits. 

Eat blueberries

Women eating a handful of blueberries a day can help lower their high blood pressure.

Lorem ipsum

Regularly, not randomly

“The key is consistency, even light, regular activity is better than long, intense workouts once in a while,” says Dr Maz Mwambazi, a GP. 

Yoga

Building muscle through weight lifting can help, as can mind-body practices like yoga, which combine physical postures, breathing, and meditation.

Prioritise fun

Chronic stress can contribute to inflammation, says Dr Rangan Chatterjee – so partake in activities which help you manage or reduce your stress levels. 

Finding a hobby you enjoy, spending time in nature and spending time connecting with friends and family have all been shown to reduce stress.

While Russia is already engaged with forms of “grey-zone” activity against the UK, including online disinformation campaigns and running covert submarine operations near undersea cables, experts and insiders believe this would be stepped up in tandem with military action as a tactic to weaken the resolve of Britons.

War manual for householders and businesses

The War Book is also expected to detail plans on how the Government would keep supplies of food, medicines, energy and industrial components flowing during wartime.

Industry chiefs are already concerned about this issue, including food security, and an MoD wargame exercise 18 months ago identified that supply chains were “largely designed for peacetime operating (with minimal resistance), not war”.

The new version of the War Book is being worked on in Whitehall and its contents are being kept under wraps.

As with the original blueprint, the reissued book will be for Government departments and the military to help prepare for war, and is not designed for public consumption.

However, insiders believe under a wartime scenario the Government and military would not be able to do everything and the war effort would require a greater contribution from the public, private sector and civilian public authorities.

UK needs to relearn the lessons from the Cold War

The official War Book is expected to be finalised by the end of this year, The i Paper understands.

It comes as Sir Keir Starmer and Defence Secretary John Healey have faced criticism over delays to the Defence Investment Plan, which will set out how the Government intends to buy military equipment needed to boost the armed forces over the next 10 years.

Asked at the London Defence Conference this month whether the Government was reviving the War Book, Knighton said: “I think that’s right. What we have seen since the end of the Cold War is the peace dividend being cashed in right across the nation and society.

He added that while the UK needs to relearn some of the lessons from the Cold War, “we’re doing it in a modern context, with a modern society, with modern infrastructure”.

The Government declined to comment further on what would be in the War Book.

But The i Paper has talked to defence insiders and experts on what is likely to be included.

‘Everyone will need to do their bit’

While the War Book would not be for ordinary citizens, defence insiders have acknowledged that public awareness of preparing for emergencies such as armed conflict should be improved.

One of the major themes of last year’s Strategic Defence Review (SDR) was the need for a “whole society” approach to defence, including protecting the homeland.

The Government launched a special section of the MoD devoted to homeland defence in August 2024, designed to build the UK’s resilience to conflict and bring together military and civilian efforts in the event of war.

Knighton told the London conference that the Government and military needed to “help the population understand some of those threats and help them understand what they can do to support the nation and potentially support the Armed Forces”.

Unlike places closer to Russia and China, like Sweden and Taiwan, the UK does not issue a printed booklet to households on how to get ready for war, but this is something under consideration as part of improving public awareness.

Britons are currently advised to use the Government’s Prepare website as a blueprint for preparing for a crisis.

The Swedish version tells citizens “everyone must do their part to defend Sweden’s independence – and our democracy” if it comes under attack, adding: “In this brochure, you learn how to prepare for, and act, in case of crisis or war. You are part of Sweden’s overall emergency preparedness.”

The booklet says in the event of a serious incident, “most of us must be able to manage on our own for at least a week”, including relying on their own stockpiles of water for drinking, cooking and cleaning, tinned food and sources of heat, as well as battery or solar-powered radios and power supplies.

These sorts of tips are already on the Prepare website and so would be expected to be included in a UK version of this booklet.

But insiders are also keen to make clear that the public will have to play a role in the war effort. One said: “Everyone will need to do their bit.”

Conservative MP and former Army officer Ben Obese-Jecty said: “The Government’s update of the War Book must be fit for the modern age.

“The Defence Readiness Bill is a key part of that framework and its delay is hampering preparation.

“The Government must articulate what a transition to war will look like for the general population. There is no longer any muscle memory.

“We need to understand what the chains of command would be for civil defence, all the way up to the nuclear firing chain; who is number 2 to Keir Starmer?

“As a society we are wholly unprepared for a major conflict, from the absence of a mortuary affairs capability in the armed forces to the inability of the Government to even publish the defence readiness bill. The Government is riding its luck and we can ill-afford to pay lip service to such a crucial issue.”

Food security urgently needs improving

The closure of the Strait of Hormuz due to the war in Iran has fuelled concerns about the UK’s food security, particularly because it has led to a blockade of stocks of fertiliser needed by British farmers for this year’s harvest.

The War Book would likely set out plans for how Government departments like the Department for Environment, Food and Rural Affairs (Defra), and the Department for Business and Trade, would work with food, farming and high street sectors to make them more resilient.

This could include arrangements for the UK to depend more on its own food production – similar to the conversion of land to “dig for victory” allotments during the Second World War – if armed conflict cut off freight routes into Britain.

The National Farmers’ Union (NFU) said the issue of food security needed to be looked at as a matter of urgency across Government.

NFU president Tom Bradshaw told The i Paper: “Feeding 70 million people relies on a strong and resilient domestic food supply and that requires prioritisation and recognition across Government. This goes beyond Defra, now is the time for all departments across Whitehall to act.”

A wargame exercise conducted by the MoD in December 2004 found that UK “supply chains are largely designed for peacetime operating (with minimal resilience), not war”, according to a letter to the defence committee from MoD permanent secretary David Williams last July.

An MoD spokesperson said: “Our Armed Forces are only as strong as the industry that equips and sustains them, which is why we are increasing national warfighting readiness.

“Backed by the largest sustained increase in defence spending since the end of the Cold War, we are investing £6bn in munitions this Parliament, including £1.5bn in an ‘always on’ pipeline and building at least six new energetics and munitions factories in the UK.”

Infrastructure

In a speech last December, the chief of the defence staff said that when the UK was renewing its water, electricity or transport infrastructure, it needed to think about the threat of action from an adversary above the threshold of war, not just as a “hybrid threat”.

Water treatment plants and reservoirs, power plants and major transport hubs are all designated critical national infrastructure (CNI), which could be targeted during armed conflict – not just by military strikes but by cyber attacks on the digital systems that run them.

A wartime scenario would probably have military and civilian guards stationed at CNI targets, as well as cyber protections already in place.

Paul Mason, honorary senior fellow at the University of Exeter’s Centre for the Public Understanding of Defence and Security, told The i Paper that Local Resilience Forums – run by councils for emergency scenarios – would be expected to pitch in to help the military.

He said: “At some point we might be told, the police are too busy guarding RAF Brize Norton, local councils, you need to find your own resources.

“Get some yellow bibs, find some shovels and get cracking because in a war, the army does what it’s trained to do.”

Internet and communication

Defence insiders believe that Britain’s cyber security would be a primary target for Russia in an armed conflict situation.

Earlier this month, Healey revealed that the Royal Navy and RAF had tracked three Russian subs in waters north of the UK, suspected of mapping crucial undersea telecommunications cables.

If war were to break out, Russia or other adversaries could attempt to cut off Britain’s digital access – which could cause social unrest.

An enemy could alternatively try to flood social media with disinformation and propaganda designed to undermine unity among British citizens at a time when the nation needed to come together.

Mason said there needed to be an urgent public debate about what civil society would be prepared to give up in terms of internet access if war broke out.

He said: “I think it’s at least legitimate that we in civil society have our say on what we think the principles should be.

“Either you have Chinese-style controls over the internet or it gets switched off. There’s no other option.”

Hospitals and schools

The original War Book included plans to use hospitals for emergencies only, and for the closure of schools.

Similar measures, such as the cancellation of non-urgent operations and school closures, were imposed during the Covid pandemic and it is likely the outbreak of war would require another drastic change to public services.

Hospitals would also need to prepare plans for treating patients injured by drone attacks or chemical, biological or nuclear weapons.

The UK already has plans in place to safeguard its stockpiles of urgent medicines, although there have been recent shortages of some painkillers, HRT treatments and Parkinson’s medication.

The new War Book plans are likely to include details of improving medicine supply chains in readiness for possible conflict.

Military

If the UK were to be engaged in a direct conflict, which threatened Britain itself, it would likely need a mass mobilisation of armed forces.

The British military currently has around 136,000 regular personnel and 32,000 reservists.

A report by RUSI last week warned that these numbers needed to be increased to prepare for a prolonged war, saying: “Policymakers and the public should be disabused of the idea that the UK’s armed forces do not need to field a large force to match a potential enemy or adversary, or that the UK can get away with leaving detailed planning until the event itself.”

The SDR last year called for the British Army to be increased from its current force of 72,000 to 100,000, although the Defence Secretary said this would not be possible during this parliament.

Even if enough people were willing to sign up, the pace of recruitment means it would take around 18 months at a minimum to boost numbers, insiders believe.