As part of the project, the team conducted 19 interviews with organisations identified by stakeholders as examples of good practice in community-centred mental health prevention for children and young people.This document presents brief summaries for each case study and provides a QR code linking to the full case study for each organisation. The aim of this work is to showcase the variety of activities delivered and of principles applied to support mental health prevention in the community. UCL Research Ethics Committee Approval ID Number: 1329 received ethics approval on 04/07/2025