Luuk van der Baaren citizenship is in certain cases regarded as a privileged status that remains reserved for a subgroup of citizens. Although this report has conclusively shown that the tolerance of dual citizenship has become the norm in EU Member States, other research avenues remain open to explore. A brief study of naturalisation rates among EU citizens in the United Kingdom and British citizens in EU Member States indicates that dual citizenship restrictions deter persons from obtaining another citizenship, although other mitigating or exacerbating factors could also play a role in this regard, which therefore requires further scholarly attention. Next to that, the interactions between national citizenship and EU citizenship could be explored further. Over the past decades, EU citizenship has developed into a fundamental status, granting a ‘bundle of rights’ across all EU Member States. Yet, as indicated above, a substantial number of EU citizens still go to the process of acquiring another EU Member State citizenship, even if Brexit-related cases are ignored. Therefore, the precise discrepancies between EU citizenship status and national (EU Member State) citizenship status could be a subject of further study. RSCAS/GLOBALCIT-Comp. 2020/4 - © 2020 Authors 19