Britain lobbied Trump for an exemption from the Anthropic AI ban. The answer was no.

TL;DRBritain lobbied the White House for an exemption from the Anthropic export ban and was told there was “zero chance.” The rejection exposes the UK’s dependence on American AI and strengthens the case for sovereign alternatives.

Sir Keir Starmer’s government spent the weekend lobbying the White House to restore British access to Anthropic’s most capable AI models. A source close to President Trump told The Telegraph there was “zero chance” of a UK carve-out.

The rejection lands as Starmer meets Trump at the G7 summit in Évian-les-Bains, where the ban is expected to come up directly. For thousands of British businesses, it is a sharp lesson in how quickly access to critical AI infrastructure can be switched off by a decision taken in another country.

On 12 June, the US Commerce Department ordered Anthropic to suspend foreign access to Fable 5 and Mythos 5, its most powerful models. Commerce Secretary Howard Lutnick sent CEO Dario Amodei a letter citing national security concerns over a reported jailbreak.

The jailbreak was reportedly flagged by Amazon CEO Andy Jassy to senior administration officials. It involved asking the model to read a codebase and identify software flaws, a technique Anthropic says is available in rival models, including OpenAI’s GPT-5.5, and is used routinely by cybersecurity defenders.

Because Anthropic could not quickly build nationality-based access controls, it disabled both models globally, cutting off Americans and foreigners alike. “If this standard was applied across the industry, we believe it would essentially halt all new model deployments for all frontier model providers,” the company said.

The UK has no frontier AI model of its own. Hospitals, financial firms, and government researchers that had integrated Fable 5 into their workflows found their tools abruptly disabled without prior warning.

Kanishka Narayan, the UK’s minister for AI, said the ban had direct implications for defence, noting that the most capable models are now used in drones, counter-drone systems, and cybersecurity. “The central question for our national security and defence is a question of our AI capability,” he said.

US Secretary of War Pete Hegseth struck a different tone. “Three months ago, the Department of War kicked Anthropic out of our building, forever,” he posted on X, adding that “every passing day proves why that was the right move.”

More than 80 cybersecurity leaders at firms including Nvidia and Adobe signed an open letter urging the curbs be dropped. They argued the ban hampers efforts to find and patch software flaws and t