The Sovereign AI Fund has made one of its most significant commitments to date, co-investing with the British Business Bank in Ineffable Intelligence, a new British company building algorithms that can learn for themselves and uncover new knowledge rather than simply copying what humans already know. The announcement, made on 27th April 2026 by the Department for Science, Innovation and Technology, positions the United Kingdom squarely behind a distinctive vision of machine intelligence.
Ineffable is developing systems that interact with their environment, test ideas and improve over time, allowing them to discover new solutions without being trained exclusively on existing data. The approach opens the door to breakthroughs in science, medicine and engineering, fields where the questions have outpaced the available human answers.
A founder with unmatched credentials
The company is led by David Silver, one of the most influential figures in modern artificial intelligence. A professor at University College London and formerly head of reinforcement learning at Google DeepMind, Silver helped power some of the biggest advances of the past decade, including AlphaGo, the system that famously beat the world champion of Go. He founded Ineffable to take the next leap forward, building AI that goes beyond imitation and generates genuinely new knowledge.
Josephine Kant, Head of Ventures at the Sovereign AI Unit, was unambiguous about the bet. ‘Very few founders in the world could credibly set out to build a superlearner, a system that discovers new knowledge from its own experience, rather than ours,’ she said. ‘David is one of them.’ She added that Ineffable is being built in the UK, and that this matters.
State capital moving at venture speed
Sovereign AI is designed to behave differently from any previous government-backed unit, acting like a venture capital fund with the muscle of the state behind it, moving quickly and backing ambition. The Ineffable investment was its second direct deal in a matter of months, bringing the total number of companies backed by the unit to eight. A further six startups, including Prima Mente, Cosine and Twig Bio, have received access to the AI Research Resource supercomputer network, tackling the need for vast amounts of specialist hardware to train advanced models.
Science and Technology Secretary Liz Kendall framed the wider ambition plainly. ‘Sovereign AI is our bet on Britain,’ she said. ‘We believe in this nation’s entrepreneurs and innovators and we are backing them to seize the benefits of AI for the UK.’ She described the Ineffable deal as supporting a company at the very frontier of the field, underlining the determination that the UK is not just an AI taker but an AI maker.
A British unicorn in the making
The commercial logic behind the state’s confidence has since become clearer. Ineffable reached unicorn status after raising a record $1.1bn in its seed round in April 2026, one of the largest seed financings ever recorded anywhere. The round placed the company at the top table of British AI alongside infrastructure and model builders that have drawn global investors to London.
For business leaders, the significance is twofold. The state has signalled that it will act like an owner, co-investing alongside private capital rather than simply subsidising research, and one of the world’s foremost AI scientists has chosen to build his next company in Britain. Both facts will shape where talent, capital and the next generation of AI companies decide to grow.