Microsoft says its new $30bn (£22bn) investment in the UK’s AI sector – its largest outside of the US – should significantly boost Britain’s economy in the next few years.

Its package forms a major part of a $31billion agreement made between the UK government and various other US tech giants, including Nvidia and Google, to invest in British-based infrastructure to support AI technology, largely in the form of data centres.

Microsoft will also now be involved in the creation of a powerful new supercomputer in Loughton, Essex.

Speaking exclusively to the BBC Microsoft CEO Satya Nadella told the BBC of the tech’s potential impact on economic growth.”

“It may happen faster, so our hope is not ten years but maybe five”.

“Whenever anyone gets excited about AI, I want to see it ultimately in the economic growth and the GDP growth.”

Prime Minister Sir Keir Starmer said the US-UK deal marked “a generational step change in our relationship with the US”.

He added that the agreement was “creating highly skilled jobs, putting more money in people’s pockets and ensuring this partnership benefits every corner of the United Kingdom.”

The UK economy has remained stubbornly sluggish in recent months.

Nadella compared the economic benefits of the meteoric rise of AI with the impact of the personal computer when it became common in the workplace, about ten years after it first started scaling in the 1990s.

But there are also growing mutterings that AI is a very lucrative bubble that is about to burst. Nadella conceded that “all tech things are about booms and busts and bubbles” and warned that AI should not be over-hyped or under-hyped but also said the newborn tech would still bring about new products, new systems and new infrastructure.

He acknowledged that its energy consumption remains “very high” but argued that its potential benefits, especially in the fields of healthcare, public services, and business productivity, were worthwhile. He added that investing in data centres was “effectively” also investing in modernising the power grid but did not say that money would be shared directly with the UK’s power supplier, the National Grid.

The campaign group Foxglove has warned that the UK could end up “footing the bill for the colossal amounts of power the giants need”.

The supercomputer, to be built in Loughton, Essex, was already announced by the government in January, but Microsoft has now come on board to the project.

Mr Nadella, revealed the investment as Donald Trump has arrived in the UK on a three-day state visit

The UK and US have signed a “Tech Prosperity Deal” as part of the visit, with an aim of strengthening ties on AI, quantum computing and nuclear power.

Google has promised £5bn for AI research and infrastructure over the next two years.

UK Chancellor Rachel Reeves opened a £735m data centre as part of the investment on Tuesday in Hertfordshire.

There are some concerns that accepting so much money from US investors will mean the UK relies too much on foreign technology.

In July, Trump made clear his intentions were for the US to win global the AI race.

One of the ways it stated it would do this was to “export American AI to allies and partners.”

The UK government has signed number of deals with US technology companies, including an agreement to use OpenAI services in the public sector and a £400m contract to use Google Cloud services in the Ministry of Defence.

Satya Nadella said he thought the agreement defined “the next phase of globalisation” and argued that having access to foreign tech services leveraged digital sovereignty rather than threatened it.

On the growing issue of AI taking over jobs, Nadella said Microsoft also had to “change with the changes in technology”, having laid off thousands of staff this year despite record sales and profits. He described it as “the hard process of renewal”.

The government also said there was “potential for more than 5,000 jobs and billions in private investment” in north-east England, which has been designated as a new “AI growth zone“.

Last year, the government announced a £10bn investment into a data centre to be built near Blyth, Northumberland.

It has now announced another data centre project dubbed Stargate UK from OpenAI, chipmaker Nvidia, semiconductor company Arm and AI infrastructure firm Nscale.

That will be based at Cobalt Park in Northumberland.

OpenAI boss Sam Altman said Stargate UK would “help accelerate scientific breakthroughs, improve productivity, and drive economic growth.”

However the UK version is a fraction of the firm’s US-based Stargate project, which OpenAI launched in January with a commitment to invest $500 billion over the next four years building new AI infrastructure for itself.

So far, reaction to the agreement has been broadly positive, but its clear that there are many challenges ahead for the UK if it is to fulfil its intended potential.

The Tony Blair Institute described the news as a “breakthrough moment” but added that Britain had some work to do: “reforming planning rules, accelerating the delivery of clean energy projects, and building the necessary digital infrastructure for powering the country’s tech-enabled growth agenda,” said Dr Keegan McBride, the Tony Blair Institute for Global Change’s emerging tech and geopolitics expert.

Matthew Sinclair, UK director of the Computer & Communications Industry Association, hailed the agreement as “a powerful demonstration of the scale of the AI opportunity for the UK economy.”

But the Conservative Party highlighted that other big international companies such as the pharmaceutical giant Merck have recently cancelled or delayed their UK expansion plans.

Satya Nadella spoke to the BBC News in between board meetings, shortly before jumping on a flight to join Donald Trump as he arrives in the UK on a three-day state visit. Nadella will be among other tech leaders, including OpenAI’s Sam Altman and Nvidia’s Jensen Huang, attending the Royal state banquet on Wednesday.

He said he would use Microsoft’s AI tool Copilot to help him decide what to wear.

“I was very surprised that there was a very different dress protocol, which I’m really not sure that I’m ready for,” he said.