Improving transparency of PFAS within supply chains is distinct from consumer-facing information considered in recommendation 11. Clearer information on where PFAS are used, in what quantities, and for what purposes can support regulatory decision-making, improve waste management outcomes, and help identify opportunities for transitioning to safer alternatives. Existing regulatory frameworks already provide mechanisms for communicating information on chemicals through supply chains. Under UK REACH and the GB Classification, Labelling and Packaging (CLP) regime, suppliers are required to provide information on hazardous substances through safety data sheets and other means where relevant. We are also closely monitoring international developments designed to improve supply chain transparency, including the EU’s SCIP database under the Waste Framework Directive and emerging Digital Product Passport initiatives, to better understand their effectiveness, implementation challenges and potential applicability in a UK context. We have also considered options for mandatory PFAS reporting through the Defra-commissioned research referenced in our response to recommendation 11. This work found that obtaining information on what PFAS is contained in mixtures and articles, and their concentrations, would be challenging in many cases. Given that chemical supply chains are often global, spanning multiple jurisdictions, this adds significant complexity to tracing PFAS use, as information may be fragmented, inconsistently recorded, or not readily accessible. As a result, mandatory reporting requirements would require careful design to ensure they are practical, proportionate and capable of delivering meaningful improvements in transparency. Through delivery of the PFAS Plan, we will continue to engage with industry to explore how supply chain transparency can be improved over time.