The Foreign and Commonwealth Office do not hold this information. Under Article 9 of the Staff Regulations of Officials of the European Communities, each EU Institution can set up their own Joint Advisory Committee for Professional Incompetence, which are internal staff management bodies for those institutes. The relevant data are owned by each institution.
In the international bodies to which the European Community is a party—with or without the Member States, the extent to which the European Community exercises rights will be determined in accordance with the rules applicable to participation of a regional body in the international body concerned. It will also depend on any internal arrangements agreed between the European Community and the Member States relating to its participation in an international body.
We do not have information available on how many times the European Community may have exercised its membership right in international bodies within the last 12 months.