The book offers interdisciplinary analyses of the impact of Brexit on the rights of EU27 citizens in the UK, Britons in the UK and the EU, and third-country nationals. It combines a historical examination of citizenship and migration between the UK, Europe and the Commonwealth with the analysis of policies and of the experiences of the different groups impacted by Brexit. The book discusses Brexit within the larger history and dynamics of UK and EU citizenship and migration. The individual chapters look at how Brexit is transforming the citizenship rights of different groups, including issues of loss of citizenship and experiences of naturalisation. They further examine the fears of the groups impacted, and larger issues of belonging, marginalisation, political orientations and mobilisations that cross legal status, nationality, ethnicity, race and class.