The European Cohort Development Project (ECDP) is a Design Study which will create the specification and business case for a European Research Infrastructure that will provide, over the next 25 years, comparative longitudinal survey data on child and young adult well-being. The infrastructure developed by ECDP will subsequently coordinate the first Europe wide cohort survey, which we name EuroCohort. The project is funded by the European Commission under Horizon2020 and is led by PERU under the leadership of Professor Gary Pollock. It builds on a previous project run by PERU, the Measuring Youth Wellbeing (MYWEB) project funded by the European Commission under FP7. People's Voice Media has been sub contracted by MMU to use its Community Reporter approach to gather user perspective to inform the survey.