The Consulting team in Woking has been actively involved in supporting projects that aim to produce sustainable liquid fuels from recycling waste materials like used cooking oils, biomass, and household refuse, along with captured carbon dioxide and low-carbon hydrogen. One major focus has been the production of Sustainable Aviation Fuels (SAF) as a sustainable alternative for the aviation industry's decarbonization. Challenges in the SAF supply chain include time, cost, and resource competition, necessitating increased investment and skilled personnel. Various pathways to SAF production exist, utilizing different feedstocks and natural resources. The article emphasizes the importance of SAF in combatting rising greenhouse gas emissions and addressing climate change effects, highlighting the benefits of using lower-carbon fuels in the aviation sector. Specific focus is placed on the production of SAF from used cooking oil, which offers environmental benefits by diverting waste oil from being discarded and reducing the reliance on imported fossil fuels, thereby enhancing energy security.