This evaluation provides a comprehensive assessment of the East Sussex NHS Health Check programme, examining its clinical, behavioural, economic, and equity related outcomes. Using a mixed methods approach, the evaluation draws on quantitative analysis of over 27,000 NHS Health Checks conducted between 2018 and 2019 and 2022 and 2024, complemented by qualitative insights from a provider survey and an economic analysis using the national Ready Reckoner tool.