Youth justice in England and Wales is delivered by multi-agency Youth Offending Teams (YOTs) which are expected to work in partnership with social welfare agencies to provide ‘holistic’ support that targets the interrelated personal and social needs of young offenders associated with their risk of reoffending. This article engages with criminological debates which attempt to interpret the hybrid assemblages of penal governance that have characterized late modernity in order to theorize why these partnerships have had only limited success in addressing the social context of youth crime. It will be argued, evidenced by an analysis of research data on YOT partnerships in action, that these assemblages are ‘classed’ in so much as they act as conduits for strategic elements which articulate powerful class interests (along with those of other social forces) to be translated into practice. Such strategic elements sustain class inequality and deny social justice to young people in conflict with the law.