The focus of this report is on the interplay between the European Union’s Regulation 1143/2014 on the Prevention and Management of the Introduction and Spread of Invasive Alien Species (IAS Regulation), and the Bern Convention on the Conservation of European Wildlife and Natural Habitats. The report explores options for extending the scope of (some of) the measures laid down in the IAS Regulation to Europe at large, beyond the EU, using the framework of the Bern Convention. It also explores options for synergies between the Regulation and Bern Convention work on IAS more generally.