The British government is beginning to speak seriously about the possibility of a major European war. The difficulty is that Britain's military and civil-defence preparations do not yet appear to match the gravity of its warnings.

Whitehall is rewriting its classified War Book for the first time since 2004. The government has encouraged households to maintain basic emergency supplies, including food, bottled water, torches and a battery and wind-up radio. Ministers stress that this is sensible preparation for emergencies ranging from severe weather and prolonged power failures to cyberattack rather than evidence that war is imminent.

At the same time, however, senior defence officials are using increasingly serious language about the international security environment. Britain's military leadership has described the present period as exceptionally dangerous, while ministers have spoken openly about the possibility of hostile Russian activity affecting the British homeland rather than merely NATO's eastern frontier.

The planned Exercise Albiston Shadow in 2027 is expected to test Britain's ability to respond to attacks upon the homeland on a scale not attempted for decades. The scenarios reportedly include sabotage, cyberattack, disinformation and attacks upon critical infrastructure. The government has also examined changes that would make it easier to recall former service personnel, while some defence preparations previously planned for the middle of the next decade are being accelerated.

Taken together, these developments indicate that the British government regards a major conflict as a possibility for which the country must prepare. The more difficult question is whether Britain possesses the military and industrial resources necessary to fight such a conflict.

A serious confrontation involving NATO and Russia would not necessarily begin with Russian tanks approaching British cities. Britain could instead face attacks upon undersea cables, pipelines, ports, airfields, communications networks, power infrastructure and computer systems. Missiles and drones could threaten strategically important facilities while cyberattacks disrupted transport, banking, water supplies and government services. Preparing the population to withstand several days of disruption is therefore sensible. But civil preparedness is only one element of national defence.

Britain's armed forces have contracted substantially since the Cold War. The regular forces number roughly 137,000 personnel, with total armed-forces strength considerably higher once reserves and other categories are included. The regular Army itself is now only a little above 70,000 trained personnel. That may be sufficient for many peacetime commitments, but a prolonged high-intensity European war would impose entirely different demands.

The problem is not simply the number of soldiers available on the first day. A country at war needs replacements for casualties, engineers, logistics personnel, medical units, maintenance crews and sufficient trained reserves to expand its forces. Recalling former personnel could provide additional manpower, but veterans cannot instantly be converted into formed military units. They need equipment, refresher training, medical assessment and integration into an effective command structure.

The munitions question is even more serious. The war in Ukraine has demonstrated the enormous consumption of ammunition in sustained conventional warfare. Artillery shells, air-defence missiles, anti-tank weapons and drones can be expended at rates that would have appeared extraordinary during Britain's post-Cold War military planning.

Britain and other NATO governments have consequently announced major investments in ammunition production. That is reasonable, but additional expenditure does not immediately produce additional weapons. Production facilities must be built or expanded, skilled workers recruited, supply chains established and long-term orders provided to manufacturers. This takes time.

A factory that no longer exists cannot be reopened by issuing a press release. A missile requiring sophisticated electronics and specialised components cannot necessarily be produced rapidly simply because the military suddenly needs more of them. Ukraine has provided Western governments with a warning that should be impossible to ignore. Industrial capacity is itself a military capability.

Britain's Royal Navy and Royal Air Force retain highly advanced equipment, but sophisticated platforms are valuable only when available in adequate numbers and supplied with sufficient weapons, spare parts and trained personnel.

The Navy faces the continuing task of protecting North Atlantic sea lanes and undersea infrastructure while maintaining carrier, submarine and other commitments. New Type 26 and Type 31 frigates will strengthen the fleet, but shipbuilding operates on timelines measured in years. A war beginning before those programs mature would have to be fought with the fleet available at that moment.

The same principle applies to aircraft, missiles and air defence. Britain cannot assume that geography provides the protection it once did. Long-range missiles, drones, sabotage and cyber warfare allow an adversary to attack critical infrastructure without attempting anything resembling an invasion of the British Isles. Ports, military airfields, electricity networks, communications facilities and transport hubs therefore become important potential targets.

This raises an uncomfortable question about Britain's civil infrastructure. The government can reasonably encourage households to maintain several days of food and water. Families should have basic emergency supplies regardless of the threat of war. But household preparedness cannot substitute for national resilience.

A country preparing seriously for conflict must consider strategic reserves of fuel, food, medicines, electrical equipment and other essential materials. High-voltage transformers deserve particular attention because they are expensive, specialised and potentially difficult to replace quickly. The loss of several important substations could create consequences far beyond the immediate physical damage.

Energy security is equally important. An increasingly electrified economy creates efficiencies and environmental benefits, but it also increases dependence upon the resilience of the electricity network. A sophisticated adversary would naturally look for weaknesses in precisely such systems. Hybrid warfare is designed to exploit them.

This is why the distinction between military and civilian preparedness has become increasingly artificial. An attack on a power network can affect military bases. A cyberattack on a commercial logistics company can interrupt military supplies. Damage to a port can disrupt both naval operations and civilian imports.

Professor Margaret MacMillan has been among those warning that a modern conflict could initially manifest itself through attacks on infrastructure and other forms of disruption rather than conventional invasion. Such possibilities deserve serious consideration.

Social cohesion matters as well. A government attempting to maintain a wartime economy requires public cooperation. Rationing, emergency regulations, industrial mobilisation and potentially some form of expanded military service would all depend upon a degree of public confidence in institutions.

A multicultural society with very low levels of trust may therefore face a defence weakness that cannot be measured simply by counting tanks and aircraft. National resilience includes the willingness of citizens to accept disruption and sacrifice when they believe those measures are necessary and fairly administered.

The central problem remains timing. Britain is increasing defence expenditure and has set substantially higher ambitions for the next decade. But much of the planned expansion extends towards 2035. If government and military warnings about the deteriorating security environment are correct, the dangerous period may arrive considerably earlier. That creates a mismatch between strategy and resources.

If a serious European conflict is plausible before 2030, defence programs designed to reach maturity in the middle of the following decade cannot provide the whole answer. Britain would need to accelerate ammunition production, improve air and missile defence, strengthen critical infrastructure and expand the trained manpower available for mobilisation. The government must also decide what level of independent capability Britain actually requires.

For decades British defence planning has rested partly upon the assumption that any major European war would be fought alongside the United States and other NATO allies. That remains a reasonable basis for planning while the alliance remains intact, but dependence upon allied support does not remove the requirement for national capability. Britain must be able to protect its own ports, airfields, communications networks and critical infrastructure while contributing meaningful forces to NATO operations.

There is consequently a danger in concentrating too heavily upon civil-defence messaging while the harder military problems remain unresolved. Updating the War Book is sensible. Conducting large national exercises is sensible. Encouraging families to maintain emergency supplies is sensible. Improving procedures for recalling veterans is sensible. But none of these measures substitutes for ammunition, trained personnel, air defence, ships, aircraft, industrial capacity and resilient infrastructure.

If the British government genuinely believes that the country has entered its most dangerous security environment since the Cold War, preparation should reflect that assessment. That means ammunition reserves capable of sustaining operations for considerably longer than the opening phase of a conflict. It means production lines capable of replacing weapons as they are expended. It means adequate protection for ports, airfields and important elements of the electricity grid. It means sufficient trained personnel to expand the armed forces during an emergency rather than relying upon an Army already stretched by its existing commitments. It also requires an honest discussion with the British public.

If a major war would eventually require rationing, industrial mobilisation or some form of compulsory national service, governments should at least examine those possibilities before an emergency rather than improvising them afterwards. Civil defence should be treated as a serious component of national security rather than merely a public-information campaign.

There is no contradiction in preparing for war while attempting to prevent one. Indeed, credible preparedness can contribute to deterrence. An adversary is less likely to believe that coercion will succeed if a country can absorb an initial attack and continue functioning.

Britain has begun acknowledging the danger. That is an important first step. The question now is whether resources will follow the rhetoric. Rewriting the War Book, conducting exercises and advising households to prepare for emergencies all have value. But if Britain's own assessment is that the risk of serious conflict is rising during the remainder of this decade, military and industrial readiness cannot be postponed until 2035. Being warned and being prepared are two different things.

https://modernity.news/2026/09/18/theyre-telling-us-a-major-war-is-coming/