This Paper considers the jurisprudence of the Court of Justice in relation to the free movement provisions of European Community law in relation to goods, persons, services and capital within the European Union. It examines the bases used by the Court in its application of Community free movement provisions to national measures that may seek to hinder the exercise of such rights. From limited enquiry originally founded on considerations of non discrimination based on nationality, to one most recently focussed on the ‘restriction’ to the free movement right, the Paper examines the methods employed by the Court of Justice in its scrutiny of the national measure appearing to conflict with Treaty free movement rights.