Britain’s reputation as Europe’s cleantech powerhouse is being undermined by a brutal funding drought at the very bottom of the pipeline, with new figures showing investment in the country’s youngest low-carbon and renewable energy companies has collapsed to its lowest level in five years.
Research published by Cleantech for UK (CTUK) reveals that the value of early-stage deals halved in 2025, while the number of transactions plunged from 188 in 2024 to just 94 last year. The slump comes despite the broader sector pulling in £7.2 billion of investment overall, comfortably outstripping Germany’s £1.7 billion and France’s £1.4 billion.
The headline figure may flatter to deceive. Strip away the late-stage mega-deals and a far more uncomfortable picture emerges of an industry whose seed corn is being eaten before it has chance to germinate.
“If we allow the pipeline to dry up now, it means we’ll have no new innovation in cleantech coming through in five years’ time,” warns Sarah Mackintosh, director of CTUK and a former head of innovation at the Department for Business, Energy and Industrial Strategy. “Funders will be sitting there waiting for scale-ups and none will come.”
CTUK, established in 2023 to bridge the gap between Whitehall and the venture community, attributes the early-stage collapse to what it terms a “triple squeeze”: punishingly high industrial energy prices, the quiet closure last year of the Government’s Net Zero Innovation Portfolio without a successor, and investor caution rooted in higher interest rates.
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