The Society of Motor Manufacturers and Traders (SMMT) publishes its June and first-half 2026 registration figures this morning, and the headline will read like recovery: another month of year-on-year growth on a market that has already registered 220,629 battery-electric cars in the year to May and that the SMMT already expects to finish 2026 up 3.6% at 2.093 million units. (SMMT car registrations)
Read the top line and the UK car market looks healthy. Read the invoice underneath it and it looks like a market buying its own volume.
The problem: the growth is subsidised, not demanded
The number that matters is not how many cars moved. It is what it cost to move them.
Manufacturers spent more than £5 billion discounting battery-electric cars in 2025 — roughly £11,000 for every BEV registered — to chase the Zero Emission Vehicle mandate, which requires 33% of new cars sold in 2026 to be zero-emission or the carmaker pays £15,000 per non-compliant vehicle. (Williamson & Croft, UK automotive retail outlook 2026)
That spend is not marketing. It is a fine-avoidance transfer: cheaper to buy the sale than to pay the penalty. And it is still not working at the pace the mandate needs.
BEVs took 22.4% of the UK market in the first quarter — a full ten points under target. (Autovista24) The year-to-date share to the end of May sat at 23.9%, on 220,629 BEVs registered. May itself hit 27.3% — the best month of the year, and still nearly six points short. (Zapmap EV market share) The SMMT has already downgraded its own full-year BEV forecast to 26.8%, conceding the 33% line will be missed. (SMMT new car market)
So the story of H1 is not that Britain went electric. It is that Britain was paid to, and it still under-bought.
The analysis: who eats the £11,000
A subsidy that large does not vanish. It moves down the chain, and it lands on three balance sheets: the manufacturer, the retailer, and — through residual values — the consumer-credit book that finances the car.
Start with the retailer. UK dealership operations are running at roughly 2.5% EBIT margins, a wafer that EV discounting, higher employer National Insurance and compliance overhead are all thinning at once. (Williamson & Croft) You can see it in the listed names. Vertu Motors booked £4.83 billion of revenue for the year to 28 February 2026, up from £4.76 billion — more turnover — yet adjusted pre-tax profit fell £4.8 million to £24.5 million. Vertu says it has lost £20 million of new-car profitability over the past 24 months. (AM-Online) Inchcape, the larger distributor, posted a lower full-year profit and guided 2026 to about 3% revenue growth on a 6% EBIT margin, a print soft enough to send the shares down 8% on results day. (Investing.com)
More revenue, less profit. That is the signature of volume bought on discount: the top line grows because the units clear, and the margin shrinks because each unit clears below where it should.
More revenue, less profit is the signature of a market buying its own volume.
The second landing spot is the used market, and this is where the discounting turns into a financial-channel problem rather than a showroom one. When a brand-new EV can be had for £11,000 off list, the two-year-old version of the same car has to price under that or it will not sell. New-car discounting is a direct suppressant on used-EV residual values — and UK EVs are already the fastest-depreciating segment in the market, retaining 22–30% of value after three years, with average used-EV prices down close to 10% year-on-year. Indicata named the ZEV mandate itself the single biggest risk to future EV residuals. (Cox Automotive on EV residuals)
The channel: PCP is where the depreciation actually sits
Most of these cars are not bought. They are financed on Personal Contract Purchase, and PCP is a bet on residual value.
A PCP payment is the gap between the price of the car and its Guaranteed Future Value — the number the lender promises the car will be worth at contract end. The customer pays down that gap over three years. The lender owns the GFV. If the car falls below the guaranteed number — because new-car discounting has collapsed the price of the equivalent used vehicle — the shortfall is the lender’s, not the driver’s, and negative equity builds across the book. (AutoHit, UK car finance 2026)
That is the quiet mechanism under a “record” registration month. The mandate pushes manufacturers to discount new EVs; the discount drags used-EV prices down; the lower used prices erode the GFVs that captive finance arms wrote at higher levels; and the volume that looks like demand today is a residual-value liability sitting on a finance book three years out. The registration is booked now. The loss, if it comes, is booked later.
The implications: read the margin, not the volume
For anyone pricing UK auto-retail equities or the consumer-credit channel behind them, the June and H1 numbers are the least useful line in the release. Volume is the input the mandate is engineered to inflate. The signal is in the spread underneath it: transaction prices net of incentive, new-car gross margin, and the GFVs the captive finance houses are still willing to underwrite.
Three things to watch as the second half opens. First, whether OEMs can hold the £5-billion-a-year subsidy rate — because the moment they pull it to defend group margin, registrations slow and the ZEV shortfall widens, and the retailers lose the volume that was carrying their fixed costs. Second, whether used-EV residuals stabilise or keep sliding, because that number sets the ceiling on how much PCP business the channel can write profitably. Third, whether the mandate is softened — every quarter it holds at 33% is another quarter of fine-avoidance discounting flowing through to margins and residuals.
Britain will have bought more cars in the first half of 2026. It bought them with someone else’s margin. The registration figure is the receipt. The bill is in the residual.
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