No one in the City expected this pop. For July, the broad call was flat growth, and even the cheeriest estimate barely pointed to a 0.1% uptick.
Instead, the economy grew 0.4% in July, coming after June had already blown past predictions. June's lift looked mostly weather and World Cup related, so one-off.
July told a different story. On Friday, the statistics office pointed to computer programming, consultancy, and information services powering the services sector, with the gains linked to artificial intelligence and cloud computing.
This is the first time UK official growth numbers have singled out AI as the lead engine, something that has been common in the US. Whether AI is boosting efficiency across the board is still an open question, but revenue from AI-related services is clearly showing up in output.
The groundwork looks like it has been forming for a while. Compared with two years earlier, business investment in the second quarter was nearly 5% higher, helped by tax incentives from recent governments.
Spending on digital networks and equipment has jumped back to heights last seen in the dot-com era. Since the first quarter of 2025, productivity growth has averaged about 2% year over year, though many economists say it is too early to give AI the credit.
According to the Office for National Statistics, AI is now used by over a third of UK companies, compared with 12% in late 2023. Only 10% report using it extensively, and use is already heavy in IT and in the professional, scientific and technical sectors.
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"There is a booming landscape of AI startups in the UK, for example, as well as many labs setting up here," said Bouke Klein Teeselink, an AI expert at King's College London.
"I'm leaning towards the side that says that we are starting to see productivity improvements," said Klein Teeselink.
Economists had penciled in Britain to top its G7 peers again on third quarter growth, based on median forecasts, with the UK's figure sitting at 0.1% before Friday and adjusted after the July data. After the latest print, expectations are being reset. Deutsche Bank now looks for a 0.4% expansion over July to September.
The timing matters for politics. A potential AI tailwind could help Prime Minister Andy Burnham's new government, which delivers its first budget next month after a bumpy week in energy and bond markets. Chancellor of the Exchequer John Healey has vowed to cut back a thicket of rules to revive growth.
The broader backdrop has been uneven.
Even if the biggest global AI names trade abroad, the UK could be a prime beneficiary of any AI boom because services dominate its economy. In June, the International Monetary Fund said Britain's potential medium-term lift to total factor productivity could reach up to 0.5% a year, "clearly above the average of European countries and on par with estimated US gains," and judged UK workers to be "both highly exposed and complementary to AI."
AI is no longer just a slide in a strategy deck. It is showing up in the GDP print, with July's 0.4% beat powered by AI-linked services and adoption rising to over a third of businesses from 12% late last year. Forecasts for the third quarter are being revised higher, and investment in digital capacity plus a pickup in measured productivity hint that this may be more than a summer fling.
If momentum keeps tracking AI and cloud demand, a services-heavy UK has room to participate even without homegrown mega-cap AI listings. Keep an eye on next month's budget, the path of energy and bond markets, and whether firms move from trial runs to broader use, because that is what will turn a surprise spurt into staying power.
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