Britain’s Cosine rallies BT, HSBC, and BAE to build a “sovereign” AI model and cut its reliance on US tech

https://media.thenextweb.com/2026/06/Cosine-team.avif

Britain’s banks, telecoms, and weapons-makers have a new shared anxiety: that the AI they increasingly run on is built, owned, and controlled in the United States. A startup barely three years old is betting they will pay to fix it.

Cosine, a UK frontier-AI lab, has assembled a coalition of blue-chip British institutions to co-design Lumen Sovereign, what it bills as Britain’s first sovereign frontier AI model.

The signatories read like a roll-call of the national economy: BT, HSBC, Lloyds, NatWest, BAE Systems, Babcock, LSEG, PwC, Thales UK, Leonardo UK, and Telefónica Tech, each signing a memorandum of understanding to help shape the model’s use cases, security requirements, and governance.

The reveal was timed for the opening of London Tech Week, where Prime Minister Keir Starmer set out a more interventionist AI strategy and announced roughly £400mn of new spending on specialist AI chips to expand the country’s computing capacity....

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