UK vehicle output fell 11.6% year on year in July to 65,000 units, the Society of Motor Manufacturers and Traders said — the sharpest monthly contraction since May and the latest sign that British plants are struggling to hold volume.

The SMMT reported the figure on Thursday. Production for the domestic market dropped more sharply than exports, though the trade body did not break out exact unit counts for either channel in its initial release.

The July decline follows a weak first half. UK factories built 445,000 vehicles in the first six months of 2025, down 9% on the same period of 2024, when full-year output came in at 779,000 units — the lowest total since the pandemic year of 2020.

SMMT chief executive Mike Hawes said the figures underline the pressure on the sector. "These figures demonstrate the challenges UK automotive manufacturing continues to face," he said, calling for government action on energy costs and trade terms to support plant competitiveness.

Production scheduling explains part of the July drop. Several plants took extended summer shutdowns or paused lines for model changeovers, which compresses the number of build days in the month and amplifies year-on-year swings. JLR's Halewood plant on Merseyside has been retooling for electric output, and Stellantis paused production at its Ellesmere Port van plant earlier this year as it converted the site to electric vehicle manufacture.

The export share of output remains the industry's structural anchor. Around four in five vehicles built in the UK are shipped abroad, with the EU, the US and China the largest markets. Any softening in export demand — from tariffs, from slower EV uptake, or from weak consumer sentiment in Europe — translates almost directly into line rates at home.

The timing matters for the sector's investment case. Nissan has committed to building two electric models at Sunderland from 2026, JLR is investing £500m in its Halewood EV plant, and BMW is preparing to build the electric Mini at Oxford. Those programs should add volume from late 2026, but until then UK output is running on legacy ICE and hybrid lines with limited headroom.

The SMMT has cut its 2025 forecast and now expects full-year output of around 820,000 vehicles, below the million-unit volumes of the late 2010s. Reaching that number requires monthly declines to narrow in the second half as shutdown effects wash out.

Watch the August and September figures. Two consecutive months of single-digit declines would suggest the July drop was largely scheduling noise; a third month of double-digit falls would point to demand-side weakness that no retooling calendar can explain.