The Chancellor's 'Buy British by design' is illegal

"Buying British not if possible, but by design."

That was John Healey in his first speech to Treasury staff, five days into the job. He repeated it to The Sun at the weekend, adding that this would be "a determined drive that you have not seen before from a British government."

The reaction has followed the usual script. Industry says it's a soundbite. Someone asks what "British" even means. The Treasury says more detail will follow.

I spent about a decade in government, including as a trade negotiator on the UK side of market access talks where procurement chapters were on the table. So I want to take the announcement more seriously than a soundbite, and be more precise than a slogan. The interesting question isn't whether the Chancellor means it. It's what he can actually do, and what he can't.

The constraint is in the Act, not in Brussels

Start with the bit that trips people up.

The UK cannot lawfully pick a supplier because of its passport on most large contracts. That isn't a Brussels hangover. It's written into the UK's own law. The Procurement Act 2023 contains an explicit non-discrimination duty towards treaty state suppliers, which flows from the WTO Government Procurement Agreement and the procurement chapters of the free trade agreements the UK signed since leaving the EU.

Above threshold, on covered procurement, from covered entities, discriminating on nationality is a breach, with remedies attached.

So "by design" cannot mean "by nationality" for the largest and most visible contracts in the system. Any policy that pretends otherwise gets challenged, and the challenge would likely win.

Where the headroom actually is

This is where the debate gets lazy, because there is a lot more room than the critics assume.

Below threshold. Below-threshold contracts are generally outside the UK's international procurement obligations and the full regime under the Procurement Act, giving contracting authorities considerably greater flexibility. Government policy already allows authorities to reserve these competitions by supplier location, either UK-wide or to a local area. That is not a proposal. It's live guidance under the current Act. It is also, in volume terms, an enormous slice of public buying.

Defence. Healey's own headline number is that over 86 per cent of major defence contracts went to British firms on his watch. That's a real achievement, but it's partly a function of defence sitting largely outside the trade commitments that bind the rest of government. The MOD playbook doesn't copy across to transport or health as neatly as the press release implies.

Requirement design. This is the quiet one, and it's the most powerful. How you write the specification determines who can credibly bid long before evaluation starts. Lot sizes, delivery timescales, security requirements, resilience obligations, minimum stockholding, response times: none of these mention nationality, and all of them shape the shortlist. Good procurement has always known this. It's just rarely stated out loud.

Social value and supply chain terms. Weightings, apprenticeship commitments, payment terms down the chain, reporting on where spend lands. Legitimate, lawful, and slow.

Add it up and the honest description of what's available isn't "buy British." It's "buy differently, and be more deliberate about consequences." Harder to say in a headline. Much more useful.

What does British mean, and why it's half answered already

Labour MP Mike Reader put the obvious question: does British mean the raw materials, the manufacturing, or the company selling the product?

It's the right question, and every country that has tried this has had to answer it with a number. The US has domestic content thresholds. The EU's defence industrial programme set a 65 per cent component rule. Percentages are how good intentions survive contact with a supply chain.

What's been missed in the coverage is that the UK has already answered part of it. Existing policy on below-threshold reservations defines supplier location as where a supplier is based or established and has substantive business operations, rather than where its corporate ownership sits.

That's a real definition, and it's a sensible one. It captures the firm with a factory in Sheffield and foreign shareholders. It excludes the shell with a registered office in London and everything else offshore. If the Chancellor wants a definition of British that stands up, he doesn't need to invent one. He needs to extend one that already exists and then decide whether it survives contact with the primes.

The devolution route is the legally easy route

Healey also said devolution gives an opportunity to roll the approach out. Given the new Prime Minister's background, that was predictable. It's also, from a purely technical standpoint, the smartest thing in the interview.

Combined authority and local spend skews smaller. More of it falls below threshold. More of it sits with entities outside the tightest coverage schedules. If you want visible wins on domestic procurement inside a parliament rather than a decade, that's where they are.

Don't forget trade deals are about reciprocity

One more, from the negotiating side of the table.

Market access in procurement is traded, not given. The UK opened up parts of the public market to get access to other countries'. British firms win contracts abroad because of those deals. Every time the UK tightens, someone tightens back, and it's rarely the same sector that gains and loses.

That's not an argument against doing this. Other countries manage the trade-off. It's an argument for knowing which trade you're making, and saying so, rather than discovering it in a dispute two years later.

What I'll be watching

Three things will tell you whether this is a programme or a press line.

1. The instrument. A revised National Procurement Policy Statement or a new PPN means intent. Amending the Act means commitment.
2. The definition. Whether the existing "substantive business operations" test gets adopted and extended, or whether we get a new one designed by committee.
3. The measurement. Whether the government publishes where the money actually lands, contract by contract, and keeps publishing it when the numbers are unflattering.

The Cabinet Office already did most of the intellectual work here. It consulted on growing British industry, jobs and skills through procurement, and published its response in March 2026. The new Chancellor has inherited a policy, not invented one. That's fine. It also means the machinery exists, which removes the usual excuse for slowness.

Buying British by design is achievable. It just doesn't look like the slogan. It looks like better specifications, smaller lots, faster payment, sharper below-threshold policy, and a lot more transparency about where £385 billion a year ends up.

Less tweetable though.