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Zemo Partnership Launches RFAS Aviation to Enhance Sustainable Aviation Fuel Traceability in the UK

Zemo Partnership Launches RFAS Aviation to Enhance Sustainable Aviation Fuel Traceability in the UK
Zemo Partnership has introduced RFAS Aviation, a voluntary assurance scheme designed to provide independent verification of sustainable aviation fuel (SAF) across the UK supply chain. This initiative responds to the urgent need for a harmonised approach to SAF traceability, particularly as the UK aviation sector faces mounting pressure to demonstrate credible greenhouse gas (GHG) emissions reductions under the UK Emissions Trading Scheme (ETS).
Addressing the Need for Consistent Verification
Until now, the absence of a standardised verification mechanism has complicated efforts by airline operators to substantiate emissions reductions and by fuel suppliers to validate the sustainability of their SAF products. RFAS Aviation builds upon the established Renewable Fuels Assurance Scheme (RFAS), widely adopted in the road transport sector, by extending its rigorous audit and assurance framework to aviation. The scheme is structured to comply with UK ETS sustainability and chain-of-custody requirements, offering a robust and independent system to verify SAF traceability from the point of blending with conventional aviation fuel, such as Jet A-1, through to delivery at airports.
A central component of RFAS Aviation is the introduction of a standardised SAF Declaration, developed by Zemo Partnership. This declaration enables fuel suppliers to submit verified data concerning SAF production pathways, feedstocks, and lifecycle GHG emissions. Serving as an auditable record, the SAF Declaration supports airline operators in substantiating their emissions reduction claims under the UK ETS, thereby enhancing transparency throughout the aviation fuel supply chain.
Context and Challenges Amid Market Dynamics
The launch of RFAS Aviation coincides with the UK’s efforts to scale up SAF supply through a forthcoming national mandate, underscoring the increasing importance of clear and consistent sustainability reporting. However, the scheme must navigate challenges in maintaining traceability and reporting standards that are sufficiently robust to meet evolving UK ETS requirements. Furthermore, the SAF market is currently experiencing volatility, with prices susceptible to increases driven by oil market shocks, including supply disruptions in the Middle East. Such fluctuations expose airlines to unpredictable fuel costs.
The competitive landscape is also evolving rapidly. European airlines are projected to triple their SAF consumption to comply with new EU blending mandates, a development that may affect U.S. renewable diesel and SAF producers reliant on domestic feedstocks. These shifting dynamics highlight the critical need for credible, independently verified sustainability claims as SAF deployment accelerates globally.
Gloria Esposito, Director of Sustainable Business at Zemo Partnership, remarked, “RFAS Aviation provides the independent verification needed to give airlines, suppliers, and regulators confidence in the traceability and sustainability of SAF. Our close collaboration with the Environment Agency has been instrumental in ensuring SAF Declarations align with UK ETS requirements and support credible emission reduction claims. We are delighted to approve Valero Energy Limited as the first SAF supplier under RFAS Aviation.”
A Framework for Credible Sustainability Claims
RFAS Aviation is open to all companies supplying SAF to the UK aviation sector and is designed to provide independent verification of SAF traceability and sustainability claims. The scheme supports compliance with UK ETS emissions reporting requirements and facilitates consistent, credible communication of SAF attributes to customers. It also strengthens transparency as SAF volumes increase within the UK fuel mix.
Importantly, RFAS Aviation safeguards against cross-market attribution by excluding kerosene supplied for non-aviation uses, such as heating, from aviation sustainability claims. As the UK aviation industry advances toward net zero emissions, RFAS Aviation offers a vital framework to ensure that sustainability claims remain credible, consistent, and independently verified.

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