Green Angel Ventures
Green Angel Ventures, formerly Green Angel Syndicate, is a London-based climate-tech investor that backs early-stage UK startups through a 350-member angel syndicate and EIS tax-relief funds. Climate, not water, is the mandate: of its portfolio, the two companies (don't) Waste Water tracks are StormHarvester and Carbogenics, both backed at Seed since 2013.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Green Angel Ventures began life in 2013 as Green Angel Syndicate, set up by Simon Acland and Nick Lyth to plug a stubborn gap: British climate-tech founders who could not find early money. Acland had spent decades in venture capital at Quester before turning his attention, and his cheque-book, to companies fighting climate change. The firm rebranded to Green Angel Ventures in 2023, but the founding idea has not moved.
Green Angel Ventures is a climate generalist, not a water house. Its members back early-stage UK startups across roughly ten sectors, from clean energy and transport to agriculture and sustainable materials. The money comes two ways: a syndicate of more than 350 angel investors who co-invest deal by deal, and the EIS Climate Change Fund, an evergreen vehicle built around the UK's Enterprise Investment Scheme (EIS), which hands investors generous tax relief for backing young, risky companies. The cheques are small and early, at the Seed end of the market.
Water is a thin slice of that climate pie. Of everything Green Angel Ventures has funded, the two names (don't) Waste Water tracks are StormHarvester and Carbogenics, two deals in total. StormHarvester is the cleaner water story: a Belfast company whose AI 'Intelligent Sewer Suite' predicts rainfall and watches sewer networks to head off floods and pollution spills, backed at Seed in 2020. Carbogenics, an Edinburgh spin-out backed in 2024, turns waste paper and coffee cups into a carbon material that makes the anaerobic digesters at wastewater plants work harder.
For a water founder, Green Angel Ventures is an unusual door to knock on. It will not pretend to be a water specialist, and its water exposure runs two companies deep. But it is one of the larger pools of climate-minded UK angel money, EIS-sweetened and syndicate-backed, and it has shown it will write a first Seed cheque when the climate case is strong enough. For an early water-tech team with a clear carbon story, that is worth a conversation.
Water Commitment Score
Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.
How they invest
Portfolio · 2 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does Green Angel Ventures invest in?
- Green Angel Ventures invests in early-stage UK climate-tech startups across about ten sectors, from clean energy and transport to agriculture and materials. It is a climate generalist, not a water fund; the two water-relevant companies (don't) Waste Water tracks are StormHarvester and Carbogenics, both backed at Seed.
- Is Green Angel Ventures a water investor?
- No. Green Angel Ventures has no water fund and no water thesis; its mandate is climate change broadly. Water appears through two of its companies: StormHarvester, which uses AI to manage sewers and flooding, and Carbogenics, whose material improves wastewater-plant digesters. Both are Seed-stage UK deals.
- Who runs Green Angel Ventures?
- Green Angel Ventures is led by chief executive Cam Ross, with Antoine Pradayrol as chief investment officer running the EIS Climate Change Fund. It was co-founded in 2013 by Simon Acland, now chairman, and Nick Lyth, now president, who built it from the former Green Angel Syndicate.
- Where is Green Angel Ventures based?
- Green Angel Ventures is based in London and invests across the United Kingdom. Founded in 2013, it backs early-stage British climate-tech companies through an angel syndicate of more than 350 members and its evergreen EIS Climate Change Fund, which carries UK tax relief for investors.
- Is Green Angel Ventures the same as Green Angel Syndicate?
- Yes. Green Angel Ventures is the rebranded name of Green Angel Syndicate, the UK climate-tech investor founded in 2013. The firm adopted the Green Angel Ventures name in 2023; both names refer to the same London-based syndicate and EIS fund manager, reachable at greenangelventures.com.