Since 2015, as part of our work for the European Agenda for Adult Learning, L&W and its partners across the UK have been researching and discussing the impact of adult learning. We have done this through the Impact Forums established in 2014 which meet in England, Northern Ireland, Scotland, and Wales every quarter. For these meetings we commissioned stimulus papers that reviewed evidence of the impact of adult learning under three broad themes: health, work, and communities. This report represents a distillation of key messages from the research papers, which were discussed at the Impact Forums, and the case studies submitted. We hope it will stimulate debate about the critical role of adult learning across the UK and Europe. [Foreword by Stephen Evans. Authors of the stimulus papers: Jan Eldred, Kathryn James, Jane Mansour, and Mark Ravenhall.]