Source: BBC

Russia’s full-scale war on Ukraine will soon enter its fifth year. Mysterious incidents of so-called “hybrid warfare” are mounting in Europe, increasing tensions. And in the UK, military chiefs have warned we must prepare for war if we want to avoid it. But if the unthinkable happened, and war with Russia broke out, could the UK fight for more than just a few weeks?

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“We are not planning to go to war with Europe. But if Europe wants to, and starts, we are ready right now.” So said Russian President Vladimir Putin on 2 December, accusing European countries of hindering US efforts to bring peace in Ukraine.

To be clear, it is extremely unlikely that the UK would ever find itself in a war with Russia on its own, unsupported by Nato allies.

But Putin’s words were an uncomfortable reminder that a war between Russia and Nato countries, including the UK, was not as remote as people hoped.

How war could look in the tech-age

“Well that’s odd. I’ve got no signal on my phone.” “Me neither. I’m offline. What’s going on?” That scenario, hypothetically, is just one way we could know that a war with Russia had begun, or was about to. (I should add that there can also be other, perfectly benign, reasons for a loss of signal.)

That signal interruption could be followed by an inability to make bank payments for essentials like food and fuel.

Food distribution would be disrupted, electricity supplies compromised.

‘We are not planning to go to war with Europe. But if Europe wants to, and starts, we are ready right now,’ Putin has said

There are many ways of fighting a war, and not just the physically destructive wave of drones, bombs and missiles so tragically familiar to the citizens of Ukraine.

Our modern, tech-driven society is highly dependent on the network of undersea cables and pipelines that connect the UK to the rest of the world, carrying data, financial transactions and energy.

Covert activity by Russian spy vessels, such as the Yantar, is widely believed to have scoped out these cables for potential sabotage in a time of war, which is why the Royal Navy has recently invested in a fleet of underwater drones equipped with integrated sensors.

In a war, these hidden, unseen actions, combined with an almost inevitable attempt to “blind” Western satellites in space, would seriously hamper the UK’s ability to fight, as well as potentially wreaking havoc on civil society.

In the UK, military chiefs have warned we must prepare for war if we want to avoid it


At a recent conference in London entitled Fighting the Long War, organised by the Royal United Services Institute (Rusi), a Whitehall think tank, military and political figures came together to discuss whether the UK’s current armed forces would be in a position to sustain a protracted conflict before they ran out of everything from troops, to ammunition to spare parts.

“There remains little evidence that the UK has a plan to fight a war lasting more than a few weeks,” argues Rusi’s Hamish Mundell. “Medical capacity is limited. Reserve regeneration pipelines are slow… The British plan for mass casualty outcomes appears to be based on not taking casualties.”

With classic British understatement, he says: “This could be considered an optimistic planning assumption.”

He adds that to fight a long war you need proper back-up. “It demands a second and even third echelon; personnel, platforms and logistics chains that can absorb losses and continue the fight. Yet this depth is notably absent from current British force design.”

Russia’s ‘low quality’ army

“There are shortfalls in ammunition, artillery, vehicles, air defence, and people, with limited to no ability to regenerate units or casualties,” says Justin Crump, CEO of Sibylline, a private intelligence company.

Two of the biggest military lessons to come out of the Ukraine war are firstly, that drones are now integral to modern warfare, at every level, and secondly, that “mass”, or sheer volume of personnel and military hardware, matters.

‘There are shortfalls in ammunition, artillery, vehicles, air defence, and people, with limited to no ability to regenerate units or casualties,’ says Justin Crump

Russia’s army is generally of a very low quality. Its soldiers are poorly equipped, poorly led and poorly fed. Their life expectancy in the deadly “drone zone” of eastern Ukraine is short.

UK Defence Intelligence estimates that since the start of the full-scale invasion in February 2022 Russia’s army has suffered more than 1.1 million casualties – that is killed, wounded, captured or missing.

Even conservative estimates put the number of Russians killed at 150,000. Ukraine has also suffered catastrophic casualties but numbers are hard to ascertain.

But Russia has been able to draw on such a massive pool of manpower that it has so far been able to replace its estimated 30,000 monthly battlefield casualties with fresh blood.

Russia’s economy has also been on a war footing for more than three years now: an economist has been placed in charge of the Defence Ministry, while its factories churn out ever more supplies of drones, missiles and artillery shells.

According to a recent report by the Kiel Institute for the World Economy, Russia has been producing each month around 150 tanks, 550 infantry fighting vehicles, 120 Lancet drones and more than 50 artillery pieces.

The UK, and most of its Western allies, are simply not anywhere near this point.

Ukraine has suffered catastrophic casualties but numbers are hard to ascertain

Analysts say it would take years for Western Europe’s factories to come close to matching Russia’s mass-production of weapons.

“The land war in Ukraine has shown beyond doubt that mass is absolutely vital for anybody that is going to face Russia on land,” says Keir Giles, a Russia expert at Chatham House think tank.

“And having deep reserves vastly greater in number than the standing regular armed forces has been shown to be essential.”

How national service conversations backfired

France and Germany have both recently moved to revive a system of voluntary military service for 18-year-olds.

The UK’s former Head of the Army, Gen Sir Patrick Sanders, suggested in 2024, the year he retired, that the UK should train what he called “a citizen army” to fight a land war in the future. The idea was shot down by No. 10.

“I think it’s a cultural thing within the UK,” says Ed Arnold, senior research fellow at Rusi.

“So if you look at the states that are now looking towards [military service] – like Sweden, Germany and France – they are states who culturally still have an institutional memory of when they had that system.

“We haven’t had national service since the 1960s and attempts to have that national conversation around it have pretty much backfired.”

France has recently moved to revive a system of voluntary military service for 18-year olds


“The reality is, our armed forces cannot survive on a diet of government spin, over-the-horizon spending commitments and hollow rhetoric,” Sir Ben Wallace, who was Defence Secretary in the Conservative government from 2019 to 2023, told the BBC.

Responding to this, a spokesperson for the current Labour Defence Secretary, John Healey, told me: “This characterisation is baseless.

“We increased defence spending by £5bn this year alone, signed 1,000 major contracts since the election and increased MOD spending with British businesses by 6% above inflation in the last year.”

He points to a new defence agreement with Norway, a £300m new investment in the Royal Navy’s laser weapon and a £9bn investment into armed forces housing, adding: “We’re a government investing in the transformation of our forces, investing in our British service personnel… to create jobs and growth in Britain’s communities.”

Germany has also introduced voluntary military service for 18 year-olds

But this is not about party politics. It’s about whether UK defence has been under-funded for so long that it has now reached the point where the country is dangerously vulnerable in several areas, notably air defence.

There are also problems of timing and inefficiency.

Defence contracts often take years to come to fruition. Billions of pounds have been spent on Ajax, an overdue armoured vehicle project still beset with problems. Meanwhile, Nato officers have been warning Russia could be in a position to launch an attack on a Nato country within three to five years.

At the end of the Cold War (between Nato and the Soviet Union) in 1990, when I was a young infantry Captain in the Army Reserves, the UK was spending 4.1% of GDP on defence.

The following year it deployed over 45,000 troops to help evict Iraq President Saddam Hussein’s invading army from Kuwait in operation Desert Storm.