UK Bets Big on AI Amid Fears of Tech Bubble Bursting

Last month, Chancellor Rachel Reeves and Technology Secretary Liz Kendall were pictured donning Google-branded high-vis jackets and hard hats as they visited the US tech giant’s £750 million data centre in Hertfordshire. The move was part of Google’s broader pledge to pour £5 billion into the UK, a package promoted as a compelling show of faith in Britain’s economic prospects. As Britain courts global tech investment to revive sluggish growth, some economists are warning that the UK’s reliance on artificial intelligence (AI) spending is growing increasingly precarious.

AI promises swift economic transformation, wild productivity gains, and cutting-edge innovation—all achieved through immense investments in data centres, AI chips, and the electricity required to keep these digital engines running. In America, the surge in spending on data facilities has become a key driver of economic activity, with Harvard’s Jason Furman noting IT equipment and software accounted for an overwhelming majority of GDP growth in the first half of this year. Deutsche Bank even suggests that, without tech-led investment, the US would have teetered on the brink of recession.

The British government is keen to ride this wave. Last year, it classified data centres as critical national infrastructure and established special “AI growth zones”, granting them fast-track planning and energy grid access. These policies are designed to attract global tech titans, and they appear to be paying dividends. Recent weeks saw Microsoft, Google, and OpenAI make UK investment pledges totalling £31 billion, with Microsoft alone targeting £11.6 billion for new AI facilities.

Britain’s data centre capacity has soared more than 50 percent in the past five years and is set to more than double again as further projects are approved or break ground. Investment from the information and communications sector has reached over £10 billion per quarter, a figure up by 43 percent compared to pre-pandemic levels. The sector’s dynamism stands in stark contrast to the modest 20 percent growth in overall UK business investment over the last decade.

Bank of England Governor Andrew Bailey has called for an unwavering commitment to rapid investment in next-generation technologies, comparing AI’s potential to the steam engine or electricity. His optimism is measured, though, with the warning that these gains materialise only if massive capital outlays are made now and bureaucratic setbacks are kept at bay.

Yet, rising concerns of an overheated tech sector are difficult to ignore. AI stocks trade at record valuations, and recent “circular” deals—such as AMD supplying chips to OpenAI in exchange for shares—evoke echoes of past tech bubbles, with sceptics cautioning against a sectoral collapse. Oracle, which rents servers to AI outfits, realises scant margins, underscoring the risks lurking beneath headline investment numbers. Oxford Economics warns that an AI crash in the US could shave as much as 1.2 percent from global GDP by 2027, with Britain potentially losing nearly 1 percent. In an economy eking out barely 1 percent annual growth, even a slight downturn could tip the country back into recession and disrupt Chancellor Reeves’s fiscal balance.

As Britain pins its growth ambitions on the AI revolution, the stakes could scarcely be higher. Should the promise of artificial intelligence falter, the hoped-for renaissance in national fortunes might prove illusory—and the bill for failed optimism could be steep indeed.