European Union Bill

My Lords, can the Minister give us any idea of the quantum at stake in this amendment, given the European Union’s well known capacity to take power by whatever method it can? He mentioned the use of former Article 308 and the noble Lord, Lord Blackwell, mentioned how we were deceived in the Maastricht negotiations over the working time directive which, in the end, turned out to be part of the social policy. How many existing competences are being practised which might require codification? Is this a big area or is it something that will not happen very often because there is not much left to codify or to put in the treaty or to agree?