The prime minister’s ambitions might be ambiguous, but unlike the Conservative leader, he is following voters and the facts

British politics is still polarised around Brexit, although 10 years on from the referendum, the terms of debate are very different. Or they should be. Russia’s invasion of Ukraine in 2022 has moved discussions of European solidarity from the realm of abstraction to a matter of urgent defence partnership. Donald Trump’s presidency in the US, marked by scorn for European democracies and indulgence of Vladimir Putin, has undermined confidence that Britain can rely on any “special relationship” with Washington.

Under these circumstances, it would be absurd to deny that a reappraisal of Brexit is in order. The prime minister acknowledged this in his speech at the Labour party conference last month, calling for a national conversation about the future relationship with every option, including rejoining, on the table. The Eurosceptic opposition are having none of it. The Conservative leader, Kemi Badenoch, accuses the government of stirring division by raising the European question. She told MPs this week that Labour should thank the Tories for the Brexit deal they negotiated.

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• Shopify CEO Tobi Lütke converted his underused wine cellar into an AI server room.
• Lütke's AI assistant researches topics and pulls together his Fitbit and calendar data.
• Lütke used heart rate data to identify his most stressful meetings and told the people involved.

The Shopify CEO didn't have enough wine to fill his cellar, but he had plenty of uses for an AI system.

Speaking with Alex Heath on an episode of the Sources podcast released on Wednesday, Tobi Lütke said he consulted his “inner 16-year-old” before converting the underused room into a home for computing hardware.

"So now I have a rack cellar, and it has like one of those GB300s from Dell in it," Lütke said. "So it is actually fully training models."

The GB300 refers to Nvidia's Grace Blackwell Ultra computing platform, which Dell has built into powerful computers designed to develop and run AI models.

Lütke said the setup allows him to run AI locally, working with sensitive information he can't send to an outside lab. The agent researches topics, prepares briefings, and gathers data about his daily life, he said.

“I think it's probably the most compelling product I've ever encountered in my life," Lütke said. "It runs a script that sort of makes a collection of all sorts of things, including my Fitbit data, and, you know, obviously has my calendar."

"It has a little app. It knows my geolocation," Lütke added. "For my hobby, I do a lot of health-style analysis, but then given that I have all this data, like I have heart rate data for, you know, for this, and I figured out who my most stressful meetings are with."

Tech bosses are finding increasingly personal uses for AI. Business Insider previously reported that Google CEO Sundar Pichai uses agents to follow internal discussions and computing usage. Apple CEO Tim Cook uses AI to summarize emails, while OpenAI's Sam Altman has turned to ChatGPT for parenting questions.

Lütke has also pushed employees to put AI to work. In a memo made public in April 2025, he said that all Shopify teams must demonstrate why they can't achieve their goals with AI before hiring new employees.

Asked by Heath whether he told the people he discovered were stressing him out, Lütke said: “Yeah. Totally.”

"It's like: here's the funniest thing I just find out — guess what?" Lütke said. "And then they didn't think it's nearly as funny."