This paper seeks to contribute to the debate on ratification and to provide policy-makers with an assessment of the options before them. Before proceeding to outline those options this paper sets out four key assumptions upon which the arguments made are based. It also outlines the importance of securing a clarification of the constitutional position via a Supreme Court ruling on the constitutionality of the Lisbon Treaty and the desirability of finding EU agreement on the right of all 27 member states to permanent representation on the European Commission.