An accounting price for biodiversity: The central government guidance for the analysis of public investment has few values that cut across all departmental appraisals. The social discount rate, the Value of a Preventable Fatality (VPF), the value of time saved (VTS) and the price of carbon are the chief examples. The Dasgupta Review (Dasgupta, 2021) cemented the case for biodiversity to be mainstreamed in government policy and appraisal due to its essential contribution to well-being.