The UK Government has just made its biggest shift in public procurement policy since 1945. Steel, shipbuilding, AI and energy infrastructure have been formally designated as critical to national security. Government contracts in these sectors will now be actively directed towards British businesses.
There is no waiting period. The guidance is in force, the sectors are named, and the opportunity is real. If your business operates in any of these four areas, now is the time to understand what has changed, what buyers will be looking for, and how to make sure you are positioned to win.
What the Government Has Announced
Published on 26 March 2026, the new Cabinet Office guidance marks a clear departure from decades of procurement-as-usual. For the first time, the Government has introduced explicit rules for how departments must approach contracts in four sectors formally designated as critical to national security: steel, shipbuilding, AI and energy infrastructure.
The core principle is straightforward. Where contracts in these sectors are involved, departments must actively consider British suppliers first. For steel specifically, the guidance goes further: departments will be required to either use British-produced steel or formally justify why they have not. This sits alongside the UK Steel Strategy launched the same week, signalling that the Government views domestic steel production as a strategic asset, not just a commercial preference.
Beyond the four priority sectors, the guidance introduces two other significant changes that will affect how public sector contracts are structured and awarded.
The first is the Public Interest Test. Any outsourced service contract valued at over £1 million must now be assessed to determine whether it could be delivered more effectively in-house by public sector workers. This test will apply to over 95% of central government contracts by value, effectively ending what the Government has described as “outsourcing by default.”
The second is a strengthened focus on community impact and social value. Businesses will be actively encouraged to integrate local job creation, skills development, and apprenticeship schemes into their bids. Departments will be required to publish and report annually against a specific social value goal for all contracts over £5 million, covering over 90% of central government contracts by value. For suppliers, this is not a soft add-on. It will be a scored, evidenced, and auditable part of the bid evaluation process.
Taken together, these changes represent a fundamental shift in what the Government expects from its suppliers, and in how competitive bids will need to be written and evidenced.
Why This Matters Now: The Supply Chain Argument
The timing of this guidance is no accident. Recent years have laid bare just how exposed the UK's critical supply chains can be. From pandemic-era shortages to the geopolitical turbulence that followed Russia's invasion of Ukraine, the fragility of global supply networks has moved from an abstract risk to a lived reality for government, industry, and the public alike.
The new guidance aligns directly with two landmark policy documents published this year. The first is the Government's National Security Strategy, which, for the first time since 1945, formally connects national security objectives with economic growth planning. The second is the Modern Industrial Strategy, which identifies long-term investment in domestic capability as essential to the UK's competitiveness. Together, they provide the political and economic rationale for why procurement policy has shifted so decisively.
What does this mean in practice? Simply put, the Government has concluded that relying on overseas suppliers for steel, naval vessels, AI infrastructure, and energy systems carries an unacceptable level of strategic risk. Building resilient domestic capacity in these sectors is now a policy priority, not just a preference. Procurement is the mechanism through which that priority will be funded and delivered.
For businesses operating in or adjacent to these sectors, this context matters. Buyers will increasingly be evaluating suppliers not just on price and quality, but on their contribution to UK resilience. Demonstrating that your business supports domestic supply chains, employs UK-based workers, and strengthens the sectors the Government has identified as critical will carry real weight in evaluation scoring.
The window to prepare is now. Contracts in these sectors will not wait for businesses to catch up.
Turn policy change into a bid advantage
Talk to Thornton & LoweWhat It Means for Businesses in the Priority Sectors
The guidance does not treat all four sectors identically. Each comes with its own commercial context, and understanding the nuances will help you position your business more effectively.
Steel and Manufacturing
Of the four sectors, steel has the most prescriptive rules attached to it. Departments must now either source British steel or provide a formal written justification for not doing so. This creates a meaningful structural advantage for UK-based steel producers and their supply chains. If your business manufactures, fabricates, or supplies steel products to the public sector, the barrier to preference has just been significantly lowered. The question is whether your bid makes that case clearly and compellingly.
Shipbuilding and Marine
British shipbuilding has long been a sector where government investment and national interest intersect. The new guidance formalises that relationship at the procurement level. Contracts for naval vessels, maritime infrastructure, and related services will be steered towards British businesses where national security considerations apply. For businesses in this space, the priority is demonstrating domestic capability, workforce strength, and supply chain resilience. All of these need to be evidenced, not just asserted, in a bid response.
AI and Technology
The inclusion of AI in the national security framework reflects the Government's view that data infrastructure, algorithmic systems, and digital sovereignty are as strategically important as physical assets. Departments procuring AI solutions will now be expected to consider the national security implications of their supplier choices. For technology businesses, this opens a significant opportunity, but it also raises the bar. Buyers will want to understand where your technology is developed, where data is stored and processed, and how your solution supports UK digital resilience.
Energy Infrastructure
Perhaps the broadest of the four sectors, energy infrastructure spans everything from grid management and renewable generation to storage and distribution systems. With the Government's clean energy ambitions running in parallel to its security agenda, contracts in this space are set to grow substantially. Businesses that can demonstrate both technical capability and a commitment to UK-based delivery, including local jobs and supply chain investment, will be strongly placed.
Across all four sectors, the common thread is clear. The Government wants suppliers who can evidence their contribution to UK resilience, not just their ability to deliver a service. That shift has direct implications for how bids need to be written.
Social Value, Local Impact & What Buyers Will Prioritise
Winning a government contract has never been purely about offering the lowest price or the most technically proficient solution. The new guidance makes the social and community dimension of bids more prominent, and more rigorously scrutinised, than ever before.
Under the updated rules, departments must publish and report annually against a defined social value goal for every contract valued over £5 million. That reporting obligation changes the dynamic significantly. Buyers are not simply asking suppliers to gesture towards community benefit. Instead, they are committing to measure and account for it publicly. The social value commitments you make in your bid need to be specific, deliverable, and tied to outcomes you can actually evidence during contract delivery.
So what does a strong social value offering look like in this new landscape? The Government has been explicit about the kinds of commitments it wants to see:
- Local job creation
- Apprenticeships
- Skills development programmes
- Supply chain investment in regional economies
Vague statements about “commitment to the community” will not score well. Buyers will be looking for named schemes, measurable targets, and a clear plan for how you will deliver and report on them.
For businesses bidding in the four priority sectors, there is an additional layer to consider. The national security framing of this guidance means that workforce and supply chain questions will carry particular weight. Demonstrating that your business employs UK-based staff, trains the next generation of workers in strategically important skills, and sources materials domestically where possible is no longer just good practice. In many cases, it is a bid requirement.
Getting this right takes preparation. Businesses that wait until a tender is published to think about their social value story will always be at a disadvantage. The strongest bids are built on commitments already embedded in how the business operates, not constructed retrospectively to fit a scoring framework.
How to Position Your Business to Win
Understanding the policy shift is one thing. Translating it into a winning bid is another. For businesses in the four priority sectors, the guidance creates real opportunity, but only for those properly prepared to pursue it.
Get your documentation in order
Before a tender even lands, buyers will assess whether your business meets the baseline requirements to compete. Insurance certificates, quality management accreditations, carbon reduction plans, and equality policies are all commonly requested at selection stage. If any of these are missing or out of date, you risk being screened out before your bid is ever read. Equally important are case studies and financial information. Both need to be current and readily accessible.
Understand the procurement landscape
The Procurement Act 2023 changed the rules of the game for public sector tendering in the UK. Frameworks, dynamic markets, and open competition procedures all operate differently under the new legislation. Knowing which route to market is most relevant to your sector gives you a significant head start. Staying on top of pipeline activity is equally important. The earlier you spot a relevant opportunity, the more time you have to prepare a genuinely competitive response.
This is where finding the right government tenders early makes a material difference. Picking up opportunities at the last minute almost always produces weaker bids. Proactive pipeline management means you can build relationships with buyers, gather intelligence on their priorities, and prepare your evidence base well in advance.
Invest in the quality of your response
In high-value, strategically sensitive contracts, the quality of your written response carries enormous weight. Evaluators are trained to score against specific criteria, and a bid that fails to address those criteria clearly will lose marks it cannot afford to lose, however strong the underlying proposition. Structure, clarity, evidence, and a compelling narrative all matter.
This is precisely where professional bid writing support delivers the greatest return. A well-written, well-evidenced bid does not just improve your score on any single tender. Over time, it builds a library of reusable content, sharpens your understanding of what buyers want, and systematically improves your win rate.
Know your differentiators
With the Government actively prioritising British suppliers in these sectors, the field of credible competitors may be narrowing. That is an advantage, but it also means buyers will scrutinise shortlisted suppliers more carefully. Being able to articulate clearly what makes your business the right choice, backed by evidence and delivered in a format that evaluators can score, is the difference between a bid that impresses and one that merely qualifies.
Need help positioning your bid more strategically?
Speak to our bid expertsCommon Questions About the New Guidance
Does this guidance apply to SMEs?
Yes. The Government has explicitly signalled its intention to make it easier for smaller businesses to compete for public sector contracts. As part of the same package of reforms, new AI tools are being introduced to streamline the commercial process, and contract terms are being simplified. Crucially, additional business information will be integrated into a central platform so that small businesses no longer have to submit the same information repeatedly when bidding for different contracts. For SMEs in the four priority sectors, this guidance represents a genuine opening.
What is the Public Interest Test?
The Public Interest Test is a new requirement introduced alongside this guidance. Before outsourcing any service contract valued at over £1 million, departments must formally assess whether the work could be delivered more effectively by public sector workers. The test applies to over 95% of central government contracts by value. For suppliers, it is worth understanding that outsourced contracts are not disappearing. When a contract does go to market, the buyer will have already concluded that external delivery represents the best outcome, which strengthens the commercial rationale for competing.
How do I know if my business qualifies for national security contracts?
There is no single accreditation or register that automatically qualifies a business for national security-related contracts. Eligibility is assessed on a contract-by-contract basis, typically through a selection questionnaire at the pre-qualification stage. What matters most is demonstrating relevant experience, financial stability, appropriate accreditations, and, increasingly, evidence of your contribution to UK resilience. If your business operates in steel, shipbuilding, AI, or energy infrastructure and delivers work for UK-based clients, you are likely better placed than you may think.
What does “social value” mean in a bid context?
Social value refers to the wider benefits a supplier commits to delivering beyond the core contract. In a bid context, it typically covers local employment, apprenticeships, supply chain investment, environmental commitments, and community engagement. Under the new guidance, social value reporting is mandatory for contracts over £5 million. For bidders, this means your social value commitments need to be specific, measurable, and genuinely deliverable, not aspirational language added at the last minute to tick an evaluator's box.
Build the Capability to Win, Not Just Compete
Responding to individual tenders is one thing. Building an organisation that wins consistently is a separate challenge entirely. Indeed, it's one that the most successful businesses in the public sector take seriously well before a contract opportunity appears.
The new national security procurement guidance raises the stakes. Buyers in these sectors will be evaluating suppliers with greater scrutiny, against more demanding criteria, and with a sharper sense of the standard required to win. The gap between businesses with strong bid capability and those without is only going to widen.
Develop your people
For many organisations, bid writing sits with whoever is available rather than whoever is best placed to do it. That is a costly approach when the contracts on the table are high value and highly competitive. Structured bid training gives your team the skills to plan, write, and review bids more effectively. It enables them to understand how evaluators think, how to structure a compelling response, and how to evidence your proposition in a way that scores. The return on that investment compounds over time, with every bid your team improves upon.
Use technology to stay ahead
In a procurement landscape that is moving quickly, intelligence is a competitive advantage. Knowing which opportunities are coming to market, which frameworks are relevant to your sector, and what your competitors have won previously allows you to make smarter decisions about where to invest your bid resource. Monitoring your pipeline systematically, rather than reacting to opportunities as they surface, puts you in a fundamentally stronger position. You have more time to prepare, more opportunity to gather buyer intelligence, and a clearer picture of the market you are competing in.
Think beyond the next bid
The businesses that win most consistently in the public sector treat bidding as a strategic function, not an administrative one. That means maintaining a live library of case studies, policies, and evidence. It means reviewing feedback from unsuccessful bids and acting on it. Beyond that, it means aligning your wider business development activity (including your relationships, your accreditations, and your social value commitments) with the sectors and buyers you most want to work with.
The Government has just signalled clearly where it intends to direct significant public spending. The businesses that respond to that signal with genuine preparation, strong capability, and well-crafted bids will be the ones that benefit most.
The Opportunity Is Real. Is Your Bid Ready?
The Government has made its priorities clear. Steel, shipbuilding, AI and energy infrastructure are no longer just commercial sectors. They are pillars of national security, and public spending will increasingly flow towards British businesses that can demonstrate they belong in that conversation.
For suppliers in these sectors, the opportunity is substantial. Yet opportunity without preparation rarely translates into contracts won. The businesses that will benefit most from this shift are those that understand the new procurement landscape, have their evidence base in order, and can articulate their value in a way that evaluators score highly.
That is exactly what we help our clients do. At Thornton & Lowe, we combine over 15 years of bid writing expertise with a detailed understanding of public sector procurement. Whether you need support responding to a specific opportunity, want to build your internal bid capability, or are looking to get smarter about your tender pipeline, we have the expertise and the track record to help.
Our team is ready to talk. Get in touch with Thornton & Lowe today to find out how we can help your business win the contracts it deserves.
