The UK Eases Its ZEV Mandate and Aligns It With 2035

A mandate under pressure

No country has pushed automakers toward electric cars with a blunter instrument than Britain's Zero Emission Vehicle (ZEV) Mandate. Introduced in January 2024, it required manufacturers to sell a rising percentage of zero-emission vehicles each year — 28% of new cars in 2025 — or pay a fine of £15,000 per vehicle over the line. By early 2025 the industry was in open revolt, with manufacturers slowing EV deliveries, discounting heavily, and warning of plant closures and lost investment. When the Labour government responded on April 7, 2025, it chose flexibility over retreat.

What changed in April 2025

The core package, announced by Transport Secretary Heidi Alexander in a statement to the Commons, kept the headline goal — no new pure petrol or diesel cars from 2030 — but rewrote the path toward it. Full hybrids and plug-in hybrids, previously due to be squeezed out by 2030, can now be sold until 2035, when every new car must be 100% zero-emission. Small manufacturers making fewer than 2,500 cars a year are exempt entirely.

Manufacturers also gained room to manoeuvre in meeting the annual percentages. The ability to borrow credits from future years was extended through 2030. Credits earned by improving the efficiency of non-electric fleets can now be earned through 2029. Most significantly for 2025, the cap on transferring CO2-reduction credits from the carmakers' own fleet-efficiency scheme into ZEV mandate compliance was raised from 45% to 90% of the target, a change that mainly benefits Jaguar Land Rover and Toyota, according to the analyst firm New AutoMotive. Fines for missing targets were cut from £15,000 to £12,000 per vehicle, with the government saying any revenue would be recycled back into support for the industry.

The government framed all of it as certainty, not loosening: "There are no changes to the trajectory of the transition set out in the ZEV mandate regulations," Alexander told MPs, adding that the reforms were "firm on our climate commitments, but flexible on how we meet them." The package came with more than £2.3 billion of support for manufacturing, batteries and charging.

The £3,750 Electric Car Grant

The demand side had been left without a purchase subsidy since the Plug-in Car Grant closed in 2022, and April's statement promised to fix that. On July 15, 2025, the Department for Transport launched the Electric Car Grant — £650 million of funding, later expanded, for new electric cars priced at or below £37,000. The discount comes in two bands: £3,750 for cars built to the highest sustainability standards and £1,500 for those meeting minimum environmental criteria.

The banding is the grant's real innovation. Eligibility depends on manufacturers holding verified science-based climate targets, and the award is scored on the carbon intensity of production, weighted 70% on where the battery is made and 30% on where the car is assembled, according to the government's scheme rules. Early band-one models included the Renault 5, Nissan Leaf, Kia EV4, Fiat 500e, Hyundai Kona Electric and Ford Puma Gen-E. Buyers receive the discount automatically at the point of sale, with funding committed through the 2028-29 financial year.

Did the flexibilities work?

The evidence from 2025 is mixed. Battery-electric cars reached 23.4% of the UK new-car market for the year, according to New AutoMotive's analysis of registration data — comfortably above 2024's level, but short of the 28% headline target. The same analysis suggests the flexibilities lowered the effective compliance threshold to roughly 20%, so manufacturers likely met their obligations without the fines the industry had feared. Plug-in hybrid sales surged as the new rules made them strategically valuable, which pleases neither purists nor the charging industry.

Critics on both flanks remain unsatisfied. Environmental groups warn the CO2-credit loopholes could let electric sales stall through the late 2020s before a brutal catch-up in 2030 — the "policy cliff edge" New AutoMotive itself flagged. Industry still complains about the 2030 date itself, the removal of the EV's vehicle excise duty exemption from April 2025, and plans for a per-mile tax on electric motoring. Consumers, meanwhile, got a genuine price cut: the £3,750 grant restored the UK to the company of European countries that still subsidize the switch.

What to watch

Three things will decide whether the softened mandate delivers. First, whether electric share keeps climbing toward the mid-30s percentages due in 2027-2028 now that the flexibility valves are open. Second, whether the grant survives its budget — £650 million buys only a few years of discounts at current rates. Third, and most consequential, whether the 2030 cliff holds. The April 2025 settlement deliberately traded short-term stringency for long-term credibility; if the 2030 date slips again, the UK will have demonstrated that no mandate survives political pressure. If it holds, Britain's approach may become the template other governments copy: strict at the end, forgiving on the way.