TL;DR

The CST, or Council for Science and Technology, which advises the Prime Minister and Cabinet, has told AI minister Kanishka Narayan that the UK needs a deliberate plan for AI sovereignty. Its letter, dated 30 July and published by the government on 19 October, warns that without “deliberate and urgent action” Britain risks ending up as “a high-value AI customer” instead of a country that shapes the technology. It makes four recommendations.

What the council means by sovereignty

The CST does not equate sovereignty with building everything at home. Its definition is enough agency at every stage of the AI value chain for the UK to reach outcomes it chooses, keep economic and public value in the country and stay resilient “under duress”. The letter, signed by co-chairs Dame Angela McLean and Lord Browne of Madingley, says government needs to know where national capability matters and where relying on others is acceptable.

The four recommendations

First, a UK AI Sovereignty Plan, beginning with a fast map covering skills, models and compute, plus data, governance and how the public takes up AI. That exercise would show what the UK ought to own outright, share with partners or simply secure access to. Those choices would feed rapid pilots in public-interest areas such as health, education and national security, each tested against six questions, from the problem being solved to how success is measured.

Second, one accountable owner, with whoever leads the AI Taskforce in the Cabinet Office offered as an example. Third, investment in the foundations: a route for AI skills and secondments alongside TechFirst, better evidence on adoption and productivity, continued funding for low-power computing research, and trials of access to important UK datasets in at least two fields, health and creative data among the suggestions.

Fourth, keep access to leading overseas models while developing chosen capabilities at home. The pilots should compare open-weight models with smaller domestic ones, some national compute should be set aside for them, and the council asks government to consider the Alan Turing Institute’s proposal for a sovereign base model, built from scratch, open-sourced and released as a public good.

Looking forward

The letter went to Narayan copied to the Chancellor, the Defence Secretary and the Prime Minister among others, but it is advice rather than policy, and it describes itself as advice “as it currently stands”. In our view it takes a similar line to the Turing Institute’s CETaS briefing in September, which framed sovereignty around fallbacks rather than self-sufficiency. The real test is recommendation two: without a single owner with a say over budgets, the mapping and pilots risk becoming another strategy document.