Volume One contains the research component, comprising of three research papers focused on understanding wellbeing in carers and young people who are looked after. The first paper is a meta-analysis examining the effectiveness of attachment-based interventions with foster and adoptive families on children’s relational, emotional and behaviour functioning. The second paper is an empirical research study investigating the role of mentalization in the development of compassion fatigue in residential carer workers who care for young people who are looked after. The third paper is written to disseminate the findings of the meta-analyses and empirical paper to foster and adoptive families, residential care workers and residential care organisations