There are many pressures on young adults to establish their careers, start families, and buy their first house. The current generation of young adults is making these major life changes in the context of financial and political upheaval. The stresses and strains of this life stage mean that this is the time when many young people experience problems with their mental health and wellbeing. Our research will measure mental health and wellbeing in young adults to explore the best ways to support young adults during this turbulent phase of their lives.