Chapter 5 turns to westward labor migration from the EU’s newly acceded Central and East European (CEE) states to the EU15 from 2004. Despite the EU’s promise full social inclusion, the migration followed an exclusionary cycle. Focusing on Britain, the chapter shows how migrants’ EU-mandated free entry and social rights provoked a welfare nationalist backlash that was amplified by the tabloid press and reflected in opinion polls and in growing support for the populist, anti-immigrant United Kingdom Independence Party (UKIP). Relying on government documents, the chapter shows how Britain’s social security bureaucracy progressively rescinded CEE labor migrants’ social rights while the government adopted exclusionary migration reforms, culminating in the 2016 Brexit vote that ended CEE migrants’ entry rights. The Brexit Settlement Scheme preserved residence rights for some on ethnically and economically discriminatory bases. Comparative case studies of CEE migration to Germany, Sweden, and Italy show that each followed the British model ‘part of the way,’ adopting more selective exclusionary policies that discriminated the poorer, younger and less-skilled. The conclusion explains why the EU failed in the effort to extend its egalitarian, inclusionary, European citizenship project eastward.