This briefing presents the findings of a study into the contextual profiles of young people suspected of displaying harmful sexual behaviours (HSB) in groups and/or on their own. In a period when peer-on-peer abuse, sexual violence in schools and responses to young people affected by sexual abuse are high on the public and policy agenda, this briefing provides a timely contribution towards deepening how HSB is understood and in addition, ensuring that the provision of services is sufficient for safeguarding young people.