Electric cars are projected to outnumber diesel vehicles in Britain by the end of the decade as sales surge and diesel registrations continue to fall.
Electric vehicles are on course to overtake diesel cars on Britain’s roads by 2030, according to new analysis of the UK motor parc. The shift marks a decisive turning point in the country’s transition away from traditional fuel types, driven by shrinking diesel sales, tighter emissions rules, and sustained growth in electric car adoption.
Data shows that registered diesel cars fell to 9.9 million in June last year, down 21 percent from their peak of 12.4 million. By contrast, the number of electric cars on UK roads has climbed to an estimated 1.7 million. While the gap remains wide, analysts say current trends point to a rapid crossover within the next five years.
The projections come from New AutoMotive, which calculates that continued declines in diesel registrations combined with strong EV growth will see electric cars surpass diesels before the end of the decade.
Diesel’s long decline accelerates
Diesel sales in the UK have never fully recovered since the 2015 emissions cheating scandal, which fundamentally altered public trust in the fuel. Last year, just 103,906 new diesel passenger cars were sold in Britain, a 15.6 percent year-on-year decline. That means only one in 20 new cars registered in 2025 ran on diesel.
A decade earlier, diesel dominated the market. In 2015 alone, around 1.28 million diesel cars were registered, accounting for nearly half of all new vehicles sold that year. Today, the diesel fleet is ageing rapidly, with many older models from the early 2000s now being scrapped.
Government policy has reinforced this shift. The planned ban on new petrol and diesel cars from 2030, alongside the Zero Emission Vehicle mandate requiring manufacturers to increase EV sales each year through 2035, has further dampened demand for diesel models.
Electric car sales gather pace
Electric vehicle uptake continues to grow, even if it has not accelerated as quickly as some early forecasts suggested. In 2025, 473,348 new electric cars were purchased, leased or financed in the UK, representing a 23.9 percent increase on the previous year.
With total passenger car sales just over two million, fully electric vehicles accounted for 23.4 percent of new registrations. While this remains below the ZEV mandate target of 28 percent for 2026, hybrids and low-emission combustion cars are helping manufacturers avoid penalties.
According to projections, the balance between diesel and electric cars will narrow sharply over the next few years. By the end of 2026, diesel numbers are expected to fall to 8.77 million, while EVs rise to 2.38 million. By 2029, diesel will retain only a marginal lead, before electric cars become the dominant powertrain on UK roads in 2030.
By the end of the decade, EVs are forecast to reach nearly seven million vehicles, compared with just over five million diesels.
Cleaner cities and shifting fuel demand
Supporters of electrification argue the transition will deliver clear public benefits. Ben Nelmes, chief executive of New AutoMotive, said ending diesel use is essential for improving air quality in Britain’s cities.
“The UK is rolling out electric cars at a rapid pace, and that’s good news for clean air, quieter streets and lower running costs,” he said, adding that reducing diesel imports would also strengthen the national economy.
Urban areas are already leading the change. In London, the Ultra Low Emission Zone has made owning older diesel cars increasingly expensive, pushing many drivers to switch to electric alternatives. Analysts believe the capital could become the UK’s first diesel-free city by 2030, with petrol stations expected to stop stocking diesel within the decade due to falling demand.
Not the end for all diesel vehicles
Despite the rapid decline in diesel passenger cars, the fuel is expected to persist longer in commercial transport. Diesel vans continue to rise in number and now stand at a record 4.4 million, as many businesses still rely on diesel for range and load capacity.
However, even here, pressure is mounting. As cities invest more heavily in local charging infrastructure, operators are increasingly considering electric vans for urban deliveries.
Industry figures argue the shift away from diesel is not ideological but practical. Ginny Buckley, chief executive of Electrifying.com, said drivers are responding to cost and convenience rather than politics.
“Diesel isn’t being phased out, it’s being replaced,” she said. “Electric cars are cheaper to run, cleaner to live with and increasingly powered by energy generated here in the UK.”
A decisive decade ahead
While petrol cars still make up the majority of the UK fleet, the balance of power between diesel and electric vehicles is clearly shifting. With policy pressure, market forces and consumer behaviour all moving in the same direction, the next five years are set to redefine what Britain’s roads look like.
If current trends hold, diesel’s long reign will end not with a ban, but with a steady replacement by electric technology that drivers increasingly see as the better option.
