This paper contributes to a growing body of work on labour market migration to the UK from the new Member States (NMS) of the European Union, particularly the migration of Polish nationals to the UK, drawing attention to the weaknesses of existing data sets which attempt to quantify these migration flows and in particular to map the geographical distribution of migrants. The analysis of Worker Registration Scheme (WRS) and National Insurance Number (NINo) allocation data demonstrates that NMS migration has focused on urban and rural locales rather than having a predominantly rural or peripheral area bias. The paper also argues that the discrepancies between WRS and NINo data potentially reveal a hidden geography of self-employment and entrepreneurial activity among NMS migrants which merits further investigation.
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