“…Following the literature on informal groupings, and informal governance more generally (Delreux and Keukeleire, ; Kleine, ; Stone, ), we propose that ‘[i] n an informal way, a self‐selected group of actors (member states, EU institutional actors, or others) can take the lead in EU policy‐making towards specific issues based on particular interests’ (Justaert and Keukeleire, , p. 445), thus creating a coalition of the willing inside the EU (Elgström, ). This marks a change of direction in the literature on the Europeanization of foreign policy, which has contributed significant insights into the uneven impact of EU membership on the foreign policies of Member States’ (Alecu de Flers and Müller, ; Tonra, ; Wong and Hill, ) but is biased against analysing Member States’ behaviour towards each other, which is considered to be the traditional domain of international relations (Sedelmeier, , p. 825).…”