Volume I, the research component, comprises of three papers, the literature review, an empirical paper and a public domain briefing document. The literature review examines emerging adulthood and parenting during this stage of development. A systematic review was undertaken on fifteen articles, with the findings being divided into two sections, an overview of the studies including the quality considerations and a summary of the findings. The empirical paper examines a qualitative research study exploring how parents have made sense of the transitions they have experienced, due to their young adult having mental health difficulties. In particular, focusing on the move from Child and Adolescent Mental Health Services (CAMHS) to Adult Mental Health Services (AMHS). The third paper briefly summarises the findings from the literature review and the empirical paper.