Scotland Bill

I declare an interest as an adjunct associate professor of British politics. I pay tribute to the fantastic work that the hon. Gentleman did in the previous Parliament. The point that SNP Members are missing is that the progress that has been made since the Scotland Act 1998 was as a result of the sovereignty of this Parliament. May I also respectfully correct the hon. Gentleman? We are not a federal Parliament, because that presupposes a codified written constitution setting out the powers, duties and responsibilities of the centre and the constituent parts of a sovereign nation.