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UK Startups and Innovation
21MAY

Kendall names UK chip five at RUSI

4 min read
10:13UTC

Liz Kendall used a Tuesday 28 April address at RUSI to name Fractile, Olix, Lumai, Optalysys and Salience Labs as British supply-chain candidates, and pre-announced an AI Hardware Plan for London Tech Week in June.

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TechnologyDeveloping
Key takeaway

Kendall named five British chip startups at RUSI on 28 April, pre-committing to a June plan.

Liz Kendall, Secretary of State for Science, Innovation and Technology, delivered an address at the Royal United Services Institute on Tuesday 28 April 2026 framing the Sovereign AI Unit and the Advanced Research and Invention Agency compute programmes as instruments of sovereign control 1. She named Fractile, Olix, Lumai, Optalysys and Salience Labs alongside Arm as the British supply-chain candidates an AI Hardware Plan is designed to underwrite, and pre-announced the plan's launch at London Tech Week in June 2026.

Kendall told the audience the SAIU was about "securing control and leverage over AI" and described the strategy as "our bet on Britain" 2. None of the five companies had been named in a ministerial speech before, despite all operating for at least three years. Public naming by a Cabinet minister moves a private company onto procurement radars overnight; for hardware companies dependent on long government purchase commitments, that visibility carries the weight of capital.

Each name works a different layer of the AI silicon stack. Fractile builds in-memory inference accelerators that compute alongside the weights rather than fetching them from separate memory; Olix designs edge AI silicon for inference at the network periphery; Lumai builds optical AI compute; Optalysys uses silicon photonics for matrix multiplication; Salience Labs runs hybrid photonic-electronic chips out of an Oxford spinout. Backing all five at meaningful scale would commit Britain to a portfolio of architectural directions rather than a single national champion.

Kendall left the AI Hardware Plan's instrument open. Procurement and equity pull in different directions: the SAIU writes equity cheques into model-training labs, while a hardware plan that reaches Fractile or Lumai at scale will need to underwrite a fab line or a multi-year purchase commitment, not a Series A. London's saturated AI datacentre grid is the structural pressure pulling the timetable forward; domestic compute that runs on domestic silicon is what the AI Growth Zones in Scotland and the north are meant to host.

The pre-announcement also raises expectations against a six-week deadline. A plan that arrives at London Tech Week without equity or procurement commitments will read as soft after the rhetoric. Kendall has named five companies and a date; the framework has to deliver an instrument that reaches them at industrial scale or be read as speech-craft.

Deep Analysis

In plain English

Most AI chips come from a small number of American companies, chiefly Nvidia. The UK currently builds almost no AI hardware of its own. Liz Kendall, the Secretary of State responsible for science and technology, used a speech at a defence think tank to name five British companies that are trying to change that. Each company is working on a different way to make computers that run AI systems more efficiently, particularly for uses where you cannot rely on a data centre in another country. Fractile puts memory and computing on the same chip. Lumai and Optalysys use light instead of electricity to perform calculations. Salience Labs combines optical and electronic approaches. Olix makes chips for devices at the edge of a network, away from large data centres. Naming them in a ministerial speech does not hand them any money directly. But it puts them on procurement radar screens at government departments and defence companies, which can be worth more than a grant if it leads to a multi-year purchase contract.

Deep Analysis
Root Causes

The five named hardware startups exist because two independent technical bets converged on a cost inflection point in 2023-24.

The optical compute bets (Lumai, Optalysys, Salience Labs) all rest on the same underlying constraint: GPU-based inference consumes power at a rate that makes large-scale deployment at the network edge economically unviable without grid-level infrastructure. Silicon photonics and hybrid photonic-electronic chips offer 10-100x improvements in operations-per-watt for matrix multiplication, which is the dominant computation in transformer inference.

The in-memory inference bet (Fractile) addresses a different bottleneck: modern large models spend most of their inference time fetching weights from separate memory banks rather than computing on them. Fractile's architecture collapses the fetch-compute boundary, cutting latency by placing computation inside the memory structure itself.

Both problems are most acute in sovereign defence and critical infrastructure applications, which cannot rely on cloud connectivity. Kendall speaking at RUSI (the Royal United Services Institute) was not coincidental: the customers for these hardware startups at scale are not consumers but government departments and defence primes.

What could happen next?
  • Opportunity

    Defence primes, including BAE Systems and Rolls-Royce, will now run competitive market assessments against the five named companies to comply with their own procurement rules. This accelerates due diligence that previously required a named government programme to trigger.

    Immediate · 0.8
  • Risk

    If the AI Hardware Plan arrives at London Tech Week in June as a strategy document without capital instruments, the five named companies face reputational exposure: they have been publicly positioned as national champions without being given the tools to succeed at that scale.

    Short term · 0.68
  • Precedent

    A government hardware plan that backs five different architectural approaches simultaneously represents a portfolio bet rather than a national champion pick. This diversification model, if it persists, changes how UK hardware startups pitch: a stronger case for complementary differentiation, not winner-take-all positioning.

    Medium term · 0.7
Sources:DSIT / GOV.UK·DSIT / GOV.UK
Mentions:Liz Kendall →RUSI →DSIT →Arm →Sovereign AI Unit →AI Research Resource →AI Growth Zones →Innovate UK →Nvidia →Advanced Research and Invention Agency →Fractile →Olix →Lumai →Optalysys →Salience Labs →AI Hardware Plan →London Tech Week →
First Reported In

Update #3 · SAIU rides $1.1bn Ineffable seed; hardware looms

DSIT / GOV.UK· 1 May 2026
Read original →
Causes and effects
Caused by
Slough saturates, AI datacentres head north
London datacentre grid saturation is the structural pressure making domestic AI hardware sovereignty politically urgent; Kendall's RUSI speech names hardware startups to address it.
Occurred 19 Apr 2026
Read story →
This Event
Kendall names UK chip five at RUSI
A Cabinet minister naming five private chip companies in a sovereignty frame moves them onto procurement radars overnight and creates a six-week political deadline.
Different Perspectives
Australian Department of Defence (AUKUS partner, Rowden Technologies)
Australian Department of Defence (AUKUS partner, Rowden Technologies)
Rowden Technologies holds active AUKUS AI for Acoustics contracts with the UK, US and Australian defence establishments. The NWF's £25m investment in Rowden on 13 May places UK sovereign capital directly into a trilateral programme Australia co-funds; from Canberra's perspective, the NWF cheque increases UK government skin-in-the-game on a programme where Australia has already committed co-development resources.
Temasek (Singapore sovereign co-investor, Isomorphic Series B)
Temasek (Singapore sovereign co-investor, Isomorphic Series B)
Temasek co-invested with the SAIU in Isomorphic's $2.1bn Series B the previous week, treating a majority Alphabet-owned company as a valid sovereign co-investment target. Fractile's round, without a UK sovereign co-investor, reads differently from Singapore's vantage: allied state capital (NATO-IF, In-Q-Tel) is now competing with Asian sovereign funds for early positions in UK deeptech.
KfW IPEX-Bank (German state development bank)
KfW IPEX-Bank (German state development bank)
KfW's participation in the £250m InstaVolt facility alongside the NWF on 18 May is the first documented post-Brexit co-investment between a German state development bank and a UK sovereign vehicle on green infrastructure. It establishes a replicable bilateral instrument that neither government has publicised as policy, operating below the threshold of formal UK-EU financial cooperation.
In-Q-Tel / NATO Innovation Fund (allied national-security capital)
In-Q-Tel / NATO Innovation Fund (allied national-security capital)
Their joint appearance on Fractile's Series B, without any UK sovereign vehicle present, signals that allied national-security funds are moving faster into UK dual-use chip startups than UK state programmes. In-Q-Tel's Series B entry implies Fractile's SRAM in-memory compute is being read as a dual-use national-security capability.
DSIT / Liz Kendall (Secretary of State for Science)
DSIT / Liz Kendall (Secretary of State for Science)
Kendall launched the AI and Future of Work Unit on 18 May and framed the £36m DAWN investment as proof the government's compute infrastructure is operational. DSIT has not publicly addressed the absence of any UK sovereign vehicle on Fractile's cap table, or whether the AI Hardware Plan's first-customer pledge will reach companies already carrying NATO-IF and In-Q-Tel stakes.
Australian Department of Defence (AUKUS AI for Acoustics partner)
Australian Department of Defence (AUKUS AI for Acoustics partner)
Rowden Technologies holds active AUKUS AI for Acoustics contracts with the UK, US, and Australian defence establishments. The NWF's £25m investment in Rowden on 13 May brings UK sovereign capital directly into a trilateral programme, which from Canberra's perspective places additional UK government skin-in-the-game on a programme Australia co-funds and co-develops.