How will the UK exit from the EU affect gender-based violence against women? Four issues are addressed to answer this question. First, the importance of theorising the interconnections with a gender regime, including between gendered economic inequality and gendered violence. Second, the significance of the difference between hard and soft security strategies for the level of gendered violence. Third, the significance of the emerging competence of the EU in the governance of violence/security relative to the member states and international bodies. Fourth, the specific nature of Brexit and the form of the future relationship between the UK and EU. The paper concludes that Brexit is likely to increase gender-based violence against women in the UK, partly as a result of the differences in the regulation of violence/security between the UK and the EU and partly as a result of increases in gender inequality in the economy that has effects across the whole gender regime