UK unveils first support wave from £500m Sovereign AI Unit, backing seven startups

The UK government has launched the first wave of support from its new £500 million Sovereign AI Unit, backing seven domestic startups with equity investment and supercomputing access to accelerate homegrown innovation and keep advanced AI capability in the country.

The package includes an equity investment in AI infrastructure firm Callosum and access to high‑performance computing for six other companies through the AI Research Resource (AIRR) network. The initiative is aimed at helping British AI companies scale rapidly while retaining expertise and economic value in the UK, with an early focus on technologies that could affect healthcare, national security and computing infrastructure.

Callosum, the first to receive equity investment, is developing infrastructure to optimise AI workflows across diverse chip architectures. Among the firms granted supercomputing time are Prima Mente, which applies AI to decode biological data to tackle diseases such as Alzheimer’s, and Cosine, which builds sovereign AI models for defence and national security applications.

The Sovereign AI Unit will provide selected startups with access to up to 1 million GPU hours on the UK’s largest supercomputers, along with fast‑tracked visas for global talent and hands‑on government support. It is also launching its first £282 million R&D funding call to create datasets and other assets intended to help firms develop faster in the UK.

The government plans to extend support to around 30 firms in total and will begin a UK‑wide tour in May to ensure benefits are spread across regions. The approach combines capital, computing power and regulatory support to help British founders build globally competitive companies from the UK.