Louise Haigh, acting as de facto deputy prime minister while Andy Burnham recuses himself over a family conflict of interest, is expected to sign off on cutting the UK's 2030 zero-emission vehicle sales target from 80% to approximately 60% after a crunch Downing Street meeting Wednesday. The move would also extend compliance flexibilities by four years to 2034, giving carmakers even more room to undershoot interim targets without facing fines. The decision caps a Whitehall turf war that split the cabinet cleanly along departmental lines. Business Secretary Jonathan Reynolds pushed for the deepest cut to 50%, Transport Secretary Heidi Alexander favoured roughly 60%, while Energy Secretary Miatta Fahnbulleh and her predecessor Ed Miliband wanted the mandate held at 80%. The compromise landing point — 60% with extended flex — hands the biggest win to industry while giving ministers rhetorical cover that the 2035 endpoint remains unchanged. The policy at stake is not a marginal regulation. The ZEV mandate is projected to deliver nearly 14% of all UK emissions reductions pledged between 2028 and 2032 — the single largest decarbonisation lever on the government's books. Cutting the interim target does not eliminate those savings; it delays and compresses them into a steeper ramp later this decade, assuming carmakers actually hit the 2035 endpoint. That assumption gets harder to defend with each successive weakening. Carmakers argue the current targets are unattainable. The SMMT reports battery EVs accounted for 26.6% of new car sales in the first ten months of the year, well short of the 33% mandate. But that headline number obscures the flexibilities already baked into the system — hybrid credits, borrowing against future sales — that mean the effective compliance burden is substantially lower than the stated percentage. The industry is lobbying against a target it is already permitted to miss without penalty. The charging industry stands to lose the most. ChargeUK warns that weakening the mandate puts £1.7bn of infrastructure investment at risk, along with associated jobs and supply chains. Charging networks made long-term capital bets predicated on rising EV penetration; a third target change in three years sends a clear signal that the policy floor keeps shifting downward. Investment planning against a moving regulatory baseline is a known destroyer of private capital commitment. The timing is politically corrosive. Burnham arrives at his first COP summit championing global electrification while his own government cuts the domestic EV target. Labour MPs including Lizzi Collinge and Catherine Fookes are already agitated by the Jackdaw gasfield approval and green spending cuts redirected to defence. If Rosebank is approved alongside a weakened ZEV mandate, the government's green credibility among its own backbenchers enters serious deficit. Haigh reportedly told colleagues she does not want them returning for another target reduction. That is precisely what was said the last two times. The pattern is now structural: carmakers lobby, ministers dilute, the 2035 endpoint absorbs all the pressure, and charging investors bear the cost of regulatory uncertainty. The question is whether a compressed, steeper ramp to 100% by 2035 is more or less achievable than a gradual climb that started higher — and whether any government will enforce the endpoint when the time comes.
