In 2021, the UK will host the G7 and COP26 and take a key part in other major summits, giving it a unique opportunity to lead the global diplomatic agenda. This report argues that he UK should use its position to drive a programme of green finance reforms that will enable a fundamental shift to a sustainable global economy. The paper recommends policies for a nature-based financial disclosures framework, better collection and standardisation of environment-related risks to the financial system, better recognition of those risks within public and central bank policies, new governance measures and a better approach to regulation that would support the shift towards green finance.