In recognition of the unique features of insolvency law, the EU developed two distinct jurisdictional and recognition regimes for civil and commercial matters on the one hand, and insolvency on the other. The relationship between the two regimes has been controversial, but it is now widely accepted by national courts and the CJEU that the regimes are intended to dovetail into one another. In theory, dovetailing ensures that the regulations constitute a comprehensive regime for all civil proceedings. In practice, it is often unclear which set of rules applies, and whether particular proceedings are within the scope of both regulations, or neither. This article examines the difficulties of dovetailing, and the continued relevance of dovetailing after the UK’s exit from the EU.