Of course, the EU is not going to fall apart, but at best it will stagnate for the foreseeable future and we will be dealing with quite a lot of internal chaos.

I do not share the half-in, half-out attitude to the EU of some in Britain. Britain's place is in Europe.

If the constitutional treaty is rejected it will be back to square one, just at a time when we want Europe to be a more effective force for good in the world, when we need to buttress ourselves against the pressures and insecurities of globalization.

In my experience of these things, parties which shout about dirty tricks and the like tend to do so because they fear a direct hit in some vulnerable part of their political anatomy.

I understand why the Tories will be gunning for Alastair Campbell because they fear his campaigning skills.

We've got to demonstrate why European unity and integration, our vast single market, our single currency, equip us with the strength to embrace globalization.

I'm optimistic that we are actually seeing the opportunity of a generation being created in this.