Background Young people in residential or foster care experience multiple transitions around their 18th birthday without the long term and consistent support from their family of origin that most of their peers can expect. We report a mixed methods qualitative study of transitions across health and social care services for children leaving care, providing narratives of what young people described as positive, and what they and professionals think might be improved. Methods Data were collected in participatory meetings and individual interviews between young people and researchers (n = 24) and individual interviews with practitioners (n = 11). In addition to discussion and interview techniques, we used pictorial and other participatory methods. Interviews were coded by three members of the team and differences resolved with a fourth. Our analysis draws on thematic and framework approaches. Results Health was rarely at the top of any young person's agenda, although gaps in health care and exceptional care were both described. Housing, financial support and education took priority. Young people and professionals alike emphasized the importance of workers prepared to go the extra mile; of young people being able to contact professionals; and professionals being able to contact one another. Conclusions Policy and practice aspirations for care leavers recommend gradual change but transfer rather than transition continues to be described by care leavers. Our data support the need for transition as a long‐term process, with children and young people having early opportunities to prepare for citizenship.