My Lords, this has been another hour and a half—but I do not begrudge that—of very interesting discussion. I am grateful to noble Lords who have spoken, overwhelmingly in support of the amendment. There are certain common themes. First, we are faced with a momentous decision. That was made very clear by the noble Lord, Lord Triesman, in his intervention during discussion on the previous amendment. Secondly, the matter is immensely complex. I am particularly grateful to the noble Lord, Lord Shipley, for giving us a sight of the trade implications and for making the link with the Electoral Commission in that one has to understand not only the question but the implications of the question. It was also agreed that we as a Parliament and supporters of democracy owe it to the electorate to give the best possible information on which to make such an informed decision. Of the arguments against, one was that such an assessment was unnecessary because it was going to happen anyway.
I think that our debate yesterday showed a Government campaigning for a change and not making preparation for plan B. The noble Lord, Lord Dobbs, argued that it was inconceivable that such an assessment would not be supplied. If it is inconceivable, what is the harm of putting it in the Bill? More importantly, however, the noble Lord said that we should rely on the arguments coming forward from the yes campaign and the no campaign. Each of those documents will be partisan, because they will try to make a particular case, whereas the assessment required by the amendment would establish some factual ground.
What is the difference between this amendment and the amendment passed last week? The noble Lord, Lord Hannay, made this clear. It falls exclusively to the government of the day to make the assessment. They will have to cope with the consequences of a no vote and they should set out what they think those consequences should be.
It was asked why we should not have a similar document on the consequences of a yes vote. There are two reasons why I have not included that in the amendment. The first is that the Prime Minister has promised us his view of what the consequences of a yes vote would be after a renegotiation. The second is, as was perceptively pointed out by the noble Lord, Lord Davies of Stamford, that there is an asymmetry of information. A lot more will be known about being in and staying in than about moving out and something is needed to rectify that imbalance.
I lived in hope that the noble Lord, Lord Dobbs, would accept the proposal from the noble Lord, Lord Wigley, and others. I hoped that he would accept the principle of it and come back with something better. He complained that this is not a perfect amendment. He has had the opportunity to take it away and improve it but he has decided to spurn that. On that basis, I do not think we can take this argument further.