- Nationals of third countries residing legally in the territory of a EU Member State (except Denmark), in accordance with (EC) Regulation No. 859/2003, which extends the scope of the provisions of (EEC) Regulation No. 1408/71 to cover this group, exclusively in the relations of one or more Member States (except Denmark) with the United Kingdom (in other words, if the interested party, whether they are an EU national or of a third country, is or has been subject to both the legislation of the United Kingdom and that of one or more Member States).