This paper examines the pre-and post-Brexit experiences and perspectives of migrants from three "new" European Union (EU) countries-Latvia, Poland, and Slovakia-who are living and working or studying in the London area. Deploying the key concepts of power-geometry and relational space, the analysis explores the way that Brexit impacted the migrants' connections to the U.K. "bounded space" and their ongoing mobility behaviour and plans. Empirical evidence comes from 35 in-depth interviews with migrants, most of whom were interviewed both before and after the referendum of June 23, 2016. We find that migrants are unequally positioned socio-spatially to deal with the new power-geometries resulting from Brexit, and we detect diverging trajectories between the more highly skilled and high-achieving EU citizens and the more disadvantaged low-skilled labour migrants. First, we probe the uncertainties brought about by juridical status, related to the length of stay in Britain.Second, we explore personal and professional connections and disruptions. Third, we question how the power-geometries of time, juridical status, and personal/professional connections/disruptions shape future mobility plans. KEYWORDS Brexit, London region, migrants from "new" EU countries, power-geometry, relational space 1 | INTRODUCTION Immediately after the European Union (EU) Referendum, on the morning of June 24, 2016, speculations, fears, and uncertainties emerged:Who would qualify to remain, who would be "forced" to leave, who will want to leave the United Kingdom? Brexit poses many questions to population geographers. But they all are grounded in the chasm between "bounded" and "relational" space: between territory defined by borders and regimes of migration control, and space as constructed through social relations and fluid, contested boundaries. Furthermore, these judicial, migration management-inflicted questions invite us to step back and uncover deeper historical relations between the notions of "settled" status versus mobile migrants, between "old" and "new" migrants and the politicisation of certain types of newcomers. In an infamous quote prior the United Kingdom's general election in 2015, Nigel Farage, then leader of the UKIP party and the key figure in stirring anti-immigrant sentiments during the "Leave" campaign, moulded colonial and post-socialist migration contexts in the United Kingdom's history of making migrants as follows: I have to confess I do have a slight preference: I do think, naturally, that people from India and Australia are in some ways more likely to speak English, understand common law and have a connection with this country than some people that come perhaps from countries that haven't fully recovered from being behind the Iron Curtain. (Mason, 2015)The people who came to the United Kingdom from countries that once were behind the "Iron Curtain" are at the heart of our inquiry.Most of our research participants arrived through the free movement of labour regime within the EU. However, the Leave campaign built i...