The membership of parties abroad: a case study of the UK

Against a long trend decline in the membership of political parties in Western democracies, there has been an unexpected surge in the UK since 2015. Interestingly, this phenomenon has also been observed amongst British expatriates, despite their historically very low levels of engagement. Our paper explores this development using a multi-methods approach to investigate its impact across the three main parties, comparing the relative importance of supply-side and demand-side factors in each case. We show that the creation and development of British parties abroad are the result of two contrasting dynamics: a top-down one, which gives legitimacy and structure and in some cases, resources, and a bottom-up one, which gives purpose but also networks. Our survey of British expatriate party members reveals a diversity of triggers and motivations for membership, making an original contribution to the wider literature on party membership and on the political engagement of emigrants.