Educational success is often measured using short-term metrics such as exam results and league tables. While these offer snapshots in time, they also provide an incomplete and misleading picture. Success is about more than short-term achievements -- it's also about individuals' long-term goals, career success, personal fulfilment and contribution to society. New destination measures have been developed and published by the Department for Education (DfE), providing information about what young people were doing in the 12 months after leaving compulsory education. While this is useful, this does not provide much information about where young people end up five or ten years after they left an institution. However, the DfE have recently developed the Longitudinal Education Outcomes (LEO) dataset. This compiles data on young people's (up to the age of 30) activities and earnings over a decade, providing greater insight into young people's longer term prospects and trajectories. The purpose of this exploratory study is to investigate the potential for using DfE's LEO dataset to track the labour market outcomes of young people (up to age 30) who completed their education in the English education system. It also seeks to provide information about the value that schools and colleges can add to young people's destinations. Specifically, this study considers to what extent destination measures can provide information about the 'value-added' by schools and colleges in supporting young people to progress onto high quality destinations. In other words, by 'value-added', it focuses on isolating the impact of the institution where they studied their main 16-18 qualification, over and above their prior attainment and wider contextual factors (including socio-economic background, region and qualification studied). [For the accompanying Technical Report, see ED619072.]