Action for Children is a charity established in 1869 that provides services to over 300,000 children, young people, and families across the UK. This document discusses the challenges faced by vulnerable young people during the transition to adulthood, after leaving care between ages 16-17. Research showed these youth are most at risk of homelessness and poor housing long-term due to lack of support, mental health issues, and unsuitable returns to family homes. Younger disabled people and those with behavioral issues are especially vulnerable. The support system needs reform to better prioritize mental health, continue therapeutic care into early adulthood, and strengthen family support through this critical transition period.