The SHARP (Social Inclusion, Hope and Recovery Project) aims to increase social inclusion, decrease distressing symptoms, reduce relapse, promote healthy living, and enable innovative practice for people in Lambeth experiencing psychosis. The impact assessment aims to use evidence collected to reach a wider audience, determine if the project makes a difference, and challenge preconceptions to effect systems changes. Reasons for the impact assessment include looking at quality of care delivered, not just numbers, and ensuring evidence requirements are appropriate for service development.