Sexual and gender-based violence (SGBV) in schools in England is a pressing concern, especially since the ‘Everyone’s Invited’ movement laid bare the extent of the problem across the country. This article analyses the national policy context, asserting that SGBV is a systemic problem rooted in young people’s school and online peer cultures that requires transformative solutions, involving active youth participation. We introduce and explore the utility of the concept of postdigital sexual citizenship. We contrast this approach with the prevailing behavioural science ‘nudge’ philosophy of government policy making and societal discussions on youth sexuality and rights currently shaping Relationships and Sex Education (RSE) discourse and policy in England. Challenging adult-centric, top-down methods and instead empowering young people as post-digital sexual citizens entitled to comprehensive RSE is vital. While our focus is on England, the arguments apply globally to jurisdictions tackling SGBV in schools.