Three of the UK's most strategically sensitive sectors — automotive, energy and chemicals — are also its most tightly wired into the European Union. Together they account for the bulk of the machinery, vehicles and industrial goods Britain sells across the Channel, and each depends on rules written in Brussels as much as in Whitehall. The EU's "Made in Europe" agenda, headlined by the draft Industrial Accelerator Act published in March 2026, would tilt subsidies, procurement and clean-tech support towards goods made inside the European Economic Area, which excludes the UK. The mechanisms differ sharply by sector, and so do the risks. Understanding them matters because the exposure is measured not in abstractions but in factories, jobs and existing contracts.

Automotive: rules of origin meet local content

The car industry faces two overlapping pressures. The first is a long-scheduled tightening of the TCA's rules of origin. From 1 January 2027, an electric vehicle traded tariff-free between the UK and EU must contain 55% combined UK-EU value added, with 70% of the battery pack and 65% of battery cells made in Europe. Miss the thresholds and a 10% Tariff applies.

The SMMT and its EU counterpart ACEA have called for a further delay, arguing battery Supply chains are not ready. Chief executive Mike Hawes has warned the requirements rest on "assumptions that have not materialised", with only around a fifth of EV batteries expected to be made in Europe by 2027.

The second pressure is the Industrial Accelerator Act's proposed 70% local-content rule for EV components (by value, excluding the battery) where public money or fleet incentives are involved. Because "Europe" is defined as the EEA, UK-built cars and parts could fall outside it. The SMMT argues that an £80bn-a-year, deeply integrated cross-Channel industry — in which the UK is the EU's largest car export market — should be treated as "Made in Europe" and has asked Brussels to amend the draft accordingly. Nissan's Sunderland plant, supporting some 6,000 direct jobs and around 30,000 in its supply chain, is the emblem of what is at stake.

Energy: local content creeps into clean-tech

In energy the concern is subtler because the instruments are newer. The EU's clean-industrial framework, building on the Net-Zero Industry Act, encourages member states to weight renewable-energy auctions with "non-price" or "resilience" criteria — effectively rewarding European-made turbines, cables and electrolysers rather than the cheapest bid. The Industrial Accelerator Act extends this logic to wind, solar, batteries, hydrogen and nuclear as "strategic" sectors.

For the UK, which exports around £2bn of offshore-wind goods and services to the EU each year and hosts a world-leading installation base, that could complicate access to European projects and subsidies. British suppliers of foundations, cabling and blades risk losing ground to EEA firms favoured in auctions.

The UK is not standing still. Its own Contracts for Difference regime now includes a "Clean Industry Bonus" that rewards developers investing in cleaner, more resilient supply chains — a mirror image of Brussels' approach. Hydrogen adds a further wrinkle: both sides are racing to build electrolyser manufacturing, and local-content preferences could fragment a market that industry bodies such as RenewableUK and Energy UK argue is more efficient when kept open. Grid components, in chronically short supply worldwide, are another pinch point where preferential sourcing could slow projects on both sides.

Chemicals: carbon borders and regulatory divergence

Chemicals — some £28bn of UK exports to the EU in 2024 — face a different mechanism again: carbon pricing at the border and the growing cost of running two regulatory systems.

The EU's Carbon Border Adjustment Mechanism (CBAM) entered its definitive phase in 2026, charging importers for the embedded emissions of goods such as steel, aluminium, fertilisers, hydrogen and cement. The UK's own CBAM is due to start in January 2027. The two schemes cover overlapping but not identical sectors, use different emissions scopes and adjust prices on different timetables. For chemical exporters selling both ways, that means dual reporting, divergent carbon costs and, for smaller firms, a compliance burden out of proportion to their size.

Layered on top is regulatory divergence under REACH, the EU's chemicals framework. Since Brexit the UK has run a parallel UK REACH regime, and the Chemical Industries Association has repeatedly flagged the cost and duplication of registering substances twice. A "Made in Europe" tilt in procurement and subsidies would compound the disadvantage of being a third-country supplier operating under a separate rulebook. Eight EU member states have themselves pressed Brussels to review CBAM and emissions-trading arrangements to protect Europe's own chemical base — a reminder that the pressures are shared, not uniquely British.

What is enacted and what is not

The distinction between proposal and law matters in every sector. CBAM on both sides is enacted and dated. The tighter EV rules of origin are already agreed and take effect in January 2027 unless extended again. By contrast, the Industrial Accelerator Act's local-content thresholds remain a draft that must clear the European Parliament and member states, with the final wording — including any "trusted partner" Carve-Out for the UK — still unsettled. The EU's separately adopted Public Procurement Act currently exempts UK suppliers from its toughest terms.

Where the risks and openings lie

For UK companies, the opportunities and risks run together. A reset deal that confers "trusted partner" status could preserve automotive supply chains, keep British offshore-wind firms eligible for EU projects, and ease chemical-sector friction through regulatory cooperation and possible CBAM linkage. Failure could mean tariffs on EVs from 2027, exclusion from subsidised clean-tech tenders, and mounting compliance costs.

None of this is settled. But the sectors most exposed are also those the government counts on for its industrial-strategy and net-zero ambitions, which is why carmakers, energy developers and chemical producers are lobbying hard ahead of the autumn summit. The mechanisms are technical; the stakes, for plants from Sunderland to the Humber, are not.