Scotland Bill

On the subject of political reality, is it not the policy of the noble and learned Lord’s party to have a constitutional convention with a view to creating a federal United Kingdom? What happens if we have a provision in law saying that the Scottish Parliament as it stands is permanent and the rest of the United Kingdom wishes to alter the structure and have a federal constitution along the lines that he suggests and that is blocked because of these provisions? Perhaps he thinks the political reality is that what he wishes for will never happen, but surely it is wrong to create inflexibility, given that he and his party accept that the present system is not a stable, lasting settlement.