If War Came, Could Britain's Tradesmen Rebuild the Country?

It's not a comfortable question. But given what's happening across Europe and beyond, it's one the construction industry needs to start asking: if Britain faced a conflict that left infrastructure damaged or destroyed, do we have the skilled workforce to rebuild it?

The short answer is no. Not even close.

And the longer answer gets worse the more you look at it.

Look Around You. The World Has Changed.

A few years ago, writing a blog like this would have felt dramatic. Now it feels overdue.

The war in Ukraine has shown the world what modern infrastructure destruction looks like — hospitals, bridges, power stations, homes, entire cities flattened. NATO nations are in active conversations about defence preparedness. Sweden and Finland joined NATO. The UK government has quietly started talking about national resilience. European countries have reintroduced conscription discussions.

The question of whether skilled tradespeople would be called up — and whether there are enough of them left if they weren't — is not hypothetical anymore. It's a legitimate national resilience question.

Would Tradesmen Be Called Up?

In a full-scale conflict requiring conscription, the honest answer is: some would, some wouldn't — and the distinction matters enormously.

In both World Wars, the British government quickly realised that pulling every working-age man into uniform was counterproductive. Certain trades were designated reserved occupations — roles so critical to the war effort and civilian survival that the people doing them were more valuable at home than on a battlefield.

In World War II, that list included miners, engineers, shipbuilders, and key construction workers. Bomb-damaged buildings needed repairing. Factories needed rebuilding. Infrastructure had to keep moving.

Any modern conflict would likely follow the same logic. Structural engineers, steelworkers, demolition specialists, and key infrastructure trades would almost certainly be classified as essential. You don't send a structural steelworker to the frontline when you need bridges repaired and buildings made safe behind it.

But here's the problem. Reserved occupation status only helps if the people exist in the first place.

The Workforce That Isn't There

Scotland and England both have a construction workforce crisis — but they got here differently, and the numbers tell two distinct stories.

Scotland

According to the CITB Construction Skills Network Scotland report, Scotland needs an estimated 6,600 additional construction workers per year over the next five years just to meet existing peacetime demand. That figure covers infrastructure projects, housing targets, and net-zero retrofit programmes — none of which are optional.

Scotland's construction workforce sits at around 150,000 to 160,000 people. It's an ageing workforce. The experienced tradespeople who learned their skills in the 1980s and 90s are heading toward retirement — and the numbers coming through to replace them have been falling for years.

Construction is consistently Scotland's largest Modern Apprenticeship sector. But Skills Development Scotland (SDS) data shows that construction MA starts have struggled to keep pace with demand, and many smaller firms simply don't have the capacity or support to take on apprentices consistently. The Scottish Government's own affordable housing target — 110,000 homes by 2032 — has already had to be quietly revised downward, partly because there aren't enough skilled workers to build them.

England

England accounts for the bulk of the CITB's headline figure — the sector across England alone needs well over 200,000 additional workers over the next five years. The problem here has a specific and identifiable cause.

In 2017, the UK government introduced the Apprenticeship Levy — a 0.5% payroll tax on large employers, ring-fenced for apprenticeship training. It sounded reasonable. In practice, it was designed for large companies with HR departments, not for the small builders, roofers, and structural firms that actually do most of the training.

The result was stark. Construction apprenticeship starts in England fell by roughly 50% between 2015/16 and 2020/21. The bureaucracy made it harder for small businesses to take on apprentices — not easier. Large corporations could access levy funds through their HR departments. A structural firm in Manchester or a roofer in Birmingham with four employees? Buried in paperwork and left with nothing.

The Federation of Master Builders (FMB) has repeatedly called out this failure. Their member surveys show that finding skilled workers has been the number one concern for small construction businesses in England for years running — ahead of materials costs, planning delays, and regulation. The Levy didn't solve it. In many ways, it made it worse.

Add two decades of both governments pushing university as the "default" career path, and you have a generation that was actively steered away from the trades. The message was clear: get a degree, not a toolbelt. We're living with the consequences now.

What Rebuilding Actually Requires

When people think about rebuilding after conflict, they often picture generic construction. In reality, it requires a very specific range of highly skilled trades working in sequence.

• Structural engineers and surveyors — to assess whether damaged buildings can be saved or must come down
• Demolition and strip-out specialists — to safely clear unsafe structures before rebuilding can begin
• Structural steelworkers — to frame and stabilise new builds and repair compromised structures
• Groundworkers — foundations, drainage, utilities infrastructure
• Bricklayers, joiners, roofers — the core fabric of any building
• Electricians and plumbers — to restore functional infrastructure

Look at Ukraine. The rebuild there is already being discussed as potentially the largest construction project in European history — estimates range up to £400 billion or more. International contractors, skilled tradespeople, and engineers from across Europe and beyond are already being earmarked.

If something similar — even on a fraction of that scale — happened closer to home, we would be competing internationally for a pool of skilled workers that is already in short supply globally.

No Pipeline, No Plan, No Answer

The alarm bells have been ringing for years. The CITB, the FMB, and Construction Scotland have all published data, raised concerns, and called for action. Both governments have largely responded with reviews, consultations, and warm words.

In Scotland

Scotland operates its own system — Modern Apprenticeships (MAs) funded through Skills Development Scotland and the Scottish Government's budget. Unlike England, Scotland is not subject to the Apprenticeship Levy. That's the good news.

The bad news is that funding for construction MAs has not kept pace with demand, and the Scottish Government has faced pressure to cut MA starts during budget squeezes. Small construction firms in Scotland report similar barriers to their English counterparts — the time cost of training, the risk of an apprentice leaving before qualification, and insufficient financial support to bridge the gap.

Construction Scotland has flagged that the industry risks losing institutional knowledge as the older generation retires — specialist skills in stonework, traditional masonry, and heritage construction that exist almost exclusively in Scotland and cannot simply be imported from elsewhere.

In England

England's Apprenticeship Levy has now been running for nearly a decade. The verdict from the construction industry is damning. The FMB's State of Trade surveys consistently show that small construction firms — the firms that train the most people — cannot access levy funds effectively.

Unspent levy funds are regularly returned to the Treasury rather than redirected to smaller businesses. The bureaucracy of the training provider system puts off employers. And despite government pledges to reform the system, the pipeline of new construction tradespeople in England remains far below what the industry needs.

In both nations, there is no serious contingency plan for what happens when construction demand spikes suddenly — whether from a housing emergency, a net-zero retrofit programme, or something considerably more serious. We have defence reviews. We have procurement strategies. What we don't have is any structured thinking about whether we have enough people who know how to build.

The Honest Picture

Let's be straight about it. In a major conflict scenario requiring significant infrastructure rebuilding, the UK would face:

• A construction workforce already tens of thousands short of peacetime demand
• An ageing tradesperson population with no adequate replacement pipeline
• An apprenticeship system that has actively shrunk over the past decade
• A generation of young people who were told trades weren't a worthy career path
• No government contingency plan for construction workforce mobilisation

In both World Wars, Britain mobilised its industrial and construction capacity with remarkable speed — partly because the workforce existed, and partly because the culture valued the people who built things. We've spent 30 years dismantling both.

The answer to "would tradesmen be called up?" is probably no — the most skilled would be protected as essential workers, as they were historically. But the answer to "do we have enough of them?" is an uncomfortable and resounding no.

What Actually Needs to Happen

We're not here to be dramatic. We're here to be honest. The trades shortage is a real and present problem — it doesn't need a war to cause serious damage to the UK economy and housing supply. But the conflict angle throws it into sharp relief.

What needs to change:

1. Fix the apprenticeship system for small businesses — the Levy needs radical reform so SME construction firms can actually access funding without drowning in paperwork
2. Revalue trades at school level — vocational pathways need to be treated as genuine career routes, not fallbacks for those who "didn't make it" to university
3. Build national resilience into workforce planning — government defence reviews should include construction workforce capacity alongside military procurement
4. Recognise the strategic value of skilled tradespeople — the people who build, maintain, and repair our infrastructure are not an afterthought. They are essential national infrastructure in human form.

History is pretty clear on this. The countries that win wars — and recover fastest from them — are the ones with the industrial and construction capacity to keep building. We built that capacity over generations. We've been quietly running it down for decades. It's time to take that seriously.

Key Takeaways

• Historically, skilled tradespeople in essential roles were classified as reserved occupations — kept at home rather than called up
• The real problem isn't conscription — it's that there aren't enough skilled tradespeople to begin with
• Scotland needs an estimated 6,600 extra construction workers per year over the next five years (CITB Construction Skills Network Scotland)
• England accounts for over 200,000 of the total 239,000 additional workers the UK needs — the scale of the problem there is enormous
• Scotland uses Modern Apprenticeships via Skills Development Scotland — but MA starts have not kept pace with demand and face budget pressure
• England's Apprenticeship Levy saw construction apprenticeship starts fall ~50% after 2017 — SME builders were locked out of the funding they pay into
• Scotland risks losing irreplaceable specialist skills — stonework, traditional masonry, heritage construction — as the older generation retires
• Ukraine's rebuild is already being called the largest construction project in European history — and the world is already short of the workers needed
• Neither the Scottish Government nor Westminster has a construction workforce resilience plan — and there needs to be one