Microsoft vice chair and president Brad Smith has delivered one of the sharpest warnings yet from a Big Tech executive about the lack of oversight of artificial intelligence, arguing that consumer products such as milk and washing machines face more scrutiny than the companies building the most powerful AI systems.
Speaking on a recent BBC podcast, Smith described AI as both “a weapon and a tool” that is putting the world’s cybersecurity at risk, and said the “moment has arrived” to institute global safety rules. He argued that the United Kingdom, rather than the United States or the European Union, is best placed to lead that effort.
His comments, reported by TechCrunch, came as Britain’s AI Security Institute confirmed on Monday that it is able to access and test the latest frontier models, after weeks of uncertainty over whether Washington would allow American labs to keep sharing their newest systems with British government testers.
Why London, not Washington or Brussels
Smith’s case for British leadership rests on positioning. The United States, home to most leading AI labs, has under President Donald Trump favoured voluntary commitments and competitiveness over binding federal rules. The European Union has taken the opposite approach with its AI Act, a comprehensive, risk-based law that has made Brussels a lightning rod for criticism in Washington.
The UK sits between those poles. Its AI Security Institute, launched in 2023 following the first global AI Safety Summit at Bletchley Park, receives access to major models from US frontier labs before they are deployed and has quickly become one of the world’s leading government AI-testing bodies. It evaluates models for dangerous capabilities in areas such as cybersecurity, biology and autonomous behaviour.
Smith argued that Britain can do things on AI that the US cannot, precisely because it is not seen as an adversary by American policymakers. “In Washington, D.C., people don’t look at the U.K. and they don’t look at London the way they look at Brussels,” he told the BBC. “That’s a strength.”

A testing role under pressure
That role has been under strain. President Trump has warned against what he calls “globalist” organisations interfering with American companies, and last month he reportedly asked Anthropic and OpenAI to withhold new models from British testers pending a US review, according to a Politico report cited by TechCrunch. The AISI’s confirmation, reported by Reuters, that it can still test the newest models suggests cooperation continues for now.
The episode highlights a growing geopolitical dimension to AI oversight. Governments increasingly see frontier models as strategic assets, and decisions about who may test them before release carry national-security and commercial implications.
Voluntary pledges are not enough
Smith’s intervention follows a White House gathering last month at which leaders of companies including OpenAI, Anthropic, Nvidia, AMD, SpaceX, Meta and Google signed a “morally binding” document committing to work with “independent auditors” to assess the safety and capabilities of their models.
Smith called the document a “good step” but said it falls short of the regulation that is needed. The weakness of voluntary self-regulation, he argued, is that only the responsible companies comply. “It’s the companies that are not as responsible that you need to worry about,” he said.



