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Burges Salmon advises Firefly Green Fuels on transformational financing to boost Sustainable Aviation Fuel technology

Picture of Rachael Ruane
By Rachael Ruane
3 Jun 2025 2 min read

We have advised a pioneering developer of sustainable aviation fuel, Firefly Green Fuels (Firefly), on its latest funding, which came from Builders Vision, a team of investors and philanthropists delivering key finance to boost cutting-edge carbon mitigation technologies across food, agriculture, energy and oceans.

As global demand for low-carbon aviation solutions intensifies, Firefly’s innovative process offers a scalable pathway to decarbonise the aviation industry while contributing to a circular waste economy. The funding enables Firefly to accelerate the development and commercialisation of its proprietary technology, which converts biosolids – organic matter recycled from sewage – into drop-in sustainable aviation fuel (SAF), and supports the expansion of its operations at pace, with a UK-based first of a kind facility expected to be operational by 2028/29.

Burges Salmon’s cross-disciplinary Sustainable Transport team advised Firefly on the transaction, led, on the banking and finance side, by partner Rachael Ruane and senior associate Bernard Ehigiamusor. They were supported, on the corporate side, by partner Alex Lloyd and senior associate Niall Mackle.

“By creating a new abundance of waste-derived SAF, Firefly Green Fuels is helping to enable a new era of sustainable growth for aviation. It has been a pleasure guiding our longstanding client through this transformational financing from Builders Vision, positioning Firefly’s novel technologies as a high impact venture that champions environmental responsibility and brings long-term economic value.”

Rachael Ruane, partner

“We are thrilled to welcome Builders Vision as a key partner in our journey to redefine how the world thinks about waste and fuel. Their support validates the potential of our technology to disrupt the SAF market and underscores the critical role that innovative financing plays in addressing climate change. Having worked with Burges Salmon for many years, we’re grateful to have such an experienced, diligent and supportive legal partner by our side.”

James Hygate, CEO – Firefly Green Fuels

Burges Salmon’s Sustainable Transport team works across the entire transport sector including rail, highways, road transport, aviation and marine and ports. With a unique blend of sector and net zero expertise, supported by a cross disciplinary team of experts, the firm covers all aspects of transport law; from funding, corporate ventures and operations to construction, development and disputes.

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