UK risks becoming 'a high-value AI customer', government science council told AI minister in a July letter published on 19 October

The government's Council for Science and Technology (CST) told AI minister Kanishka Narayan in a letter sent in July that "Without deliberate and urgent action, the UK risks becoming a high-value AI customer, rather than a country able to shape the technology and its usage." The letter is dated 30 July 2026 and was published on gov.uk today, 19 October 2026.

It is signed by the council's co-chairs, Dame Angela McLean and Lord Browne of Madingley, and makes four recommendations, starting with a "UK AI Sovereignty Plan".

What the letter says

The CST defines AI sovereignty as "having sufficient agency across the AI value chain to deliver the UK’s chosen outcomes, capture economic and public value for the UK, and maintain resilience under duress."

The letter says the choices the UK makes now "will shape long-term competitiveness, resilience, public trust and strategic autonomy", and that government "needs a clear view of where national capability matters, where dependence is acceptable, and where the UK has a credible opportunity to lead."

The advice is not presented as final. The council writes (web version) that it is "developing advice for the government on artificial intelligence (AI) sovereignty", and describes the annex as "a summary of the advice as it currently stands". The letter names no spending figure.

The four recommendations

The annex sets out four recommendations, worded as follows:

1. "Develop a UK AI Sovereignty Plan based on a clear overview of the AI ecosystem." The first step, it says, should be "rapidly mapping out" computing power, data, skills, models, governance and public adoption, so as to identify which capabilities the UK "should own, collaborate with others on, or secure resilient access to." Those choices should feed "rapid AI pilots" in public-interest areas "such as national security, health, or education".
2. "Set up clear governance and coordination for AI sovereignty choices." The letter says government "should designate a single accountable owner, such as the head of the Cabinet Office AI Taskforce."
3. "Invest now in the foundations of long-term UK AI capability." This includes "an AI skills and secondment route that complements TechFirst", and testing data access arrangements "in at least two high-value areas, such as health and creative data" (PDF wording).
4. "Maintain trusted access to leading AI models while building selected UK capability." The letter says the UK "should not depend on them for all use cases", and that pilots should test options "such as open weight models and domestic smaller models". It says government "should consider proposals such as the Alan Turing Institute’s" for "a public-interest sovereign base model"; a footnote describes that proposal as "an open-source sovereign base model from scratch".

The gov.uk summary page words the third recommendation slightly differently: "invest now in the foundations of long-term domestic AI capability, including skills, data and public trust".

What the CST is

Gov.uk describes the council as providing "independent advice to the Prime Minister on science and technology policy issues across government." The letter calls it "government’s top-level independent advisory body on cross-cutting science and technology issues", bringing together "leaders across academia, business and finance".

The letter credits nine council members with developing the advice, including Professor Sir Nigel Shadbolt, Priya Lakhani and Professor Nick McKeown. It was copied to the Prime Minister, the Chancellor, the Business, Defence and Digital, Culture, Media and Sport Secretaries and the Chair of the Prime Minister's AI Taskforce, among others.

The CST's published minutes for June 2026 say its AI project "aims to provide a first tranche of advice on AI sovereignty, including whether the UK should develop a sovereign model (or models)". In August 2025 the council published a separate report on building a sovereign AI chip design industry in the UK.

Sent in July, published in October

Gov.uk records Narayan as Minister of State (Minister for Artificial Intelligence), a joint Cabinet Office and Department for Business, Innovation, Science and Trade role, from 20 July 2026. The letter, dated ten days later, opens by congratulating him "on your appointment". The gov.uk page went live at 10:30 BST today.

We searched gov.uk for a published government response to the letter and found none.

Context

On 28 September, City AM reported an open letter from tech bosses, coordinated by the British AI lab Cosine, that called for a £20bn-plus sovereign AI commitment and, City AM says, a Sovereign AI Capability Plan within 90 days. The CST's letter is dated about two months earlier.

Separately, today's Daily Update covered the Guardian's report that Microsoft has pulled out of Nscale's planned datacentre at Loughton, Essex, over power supply concerns. In January 2025 a government release said Nscale had "signed a contract to build the largest UK sovereign AI data centre in Loughton, Essex by 2026." The CST letter predates that report and does not mention Nscale or Loughton.

For a primer on the term, see our explainer, What 'sovereign AI' actually means.

Why it matters

The CST's own case is that "Choices made now will determine whether we can build the future capability needed for prosperity and resilience" (web version wording).

On our reading, the letter is a framework for deciding what to own, share or buy access to, rather than a spending plan: it proposes a map, pilots and a named owner, and leaves the costs to government. Whether ministers adopt a "UK AI Sovereignty Plan" or name a single owner is the thing to watch; as of today we have found no published response.