In this section we first highlight the complications generated by the precise policy context in which ecosystem services valuation is taking place and the implications for the level of detail subsequently required in the assessment process. We then outline the main approaches that can be used to undertake socio-economic appraisal within the overall ESApp. The UK, for example, has adopted a broad minimum standard of ‘no net loss’ of biodiversity within the context of its international commitment to conserve biological diversity, its own nature conservation measures and relevant EU Directives.