There is an increasing emphasis internationally on better understanding the links between inequalities and processes within school systems. In England there has been a particular focus on rates of school exclusion because the national data has consistently highlighted troubling patterns of over-representation. This paper argues that a move away from recorded exclusion to other forms of sanction and provision makes more contextualised readings of these data key to better understanding their association with inequalities. It also explores the challenges faced by key stakeholders working to reduce inequalities within an increasingly marketised system. It concludes that embedding consistent good practice across the system remains a critical challenge.