The UK is investing heavily in both quantum technologies and clean energy, yet the two remain largely treated as separate policy priorities. This report explores how closer coordination could unlock significant opportunities: from using quantum sensing, optimisation and simulation to improve energy systems, to ensuring that the growth of quantum computing is supported by reliable, low-carbon infrastructure.
It sets out practical recommendations to align quantum and clean energy policy, infrastructure planning and public investment, helping the UK translate its technological leadership into domestic deployment and long-term industrial value.
The UK cleantech sector closed 2025 confirming a structural weakness longassociated with British industry: the country develops promising technologiesand struggles to retain them at the point of scale.
But 2025 revealed something more serious than that familiar pattern.
Early-stage investment contracted sharply. Seed and Series A deal activity fell by 50 per cent to 94 deals, the lowest level since before 2020. The pipeline that produces the companies the UK has historically struggled to scale is itself narrowing. Without intervention, there will be fewer domestic technologies capable of reaching commercial maturity in the years ahead.
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