In reply to bluebealach:
If Labour were any good they could clobber Cameron on this. For a start deliberately, or by inadvertence, which would be even worse, he's given the British economy 5 years of uncertainty, both for existing companies and those looking around for a country in Europe to invest in.
Secondly the way he's presenting it looks very much like blackmail in other EU countries - either accept my demands or we'll leave. Really playing into the hands of the anti-British lobby... they're lapping it up!
But the strongest argument for Labour must surely be that to envisage Britain leaving the EU after what has been a pretty successful period of membership just to improve Cameron's chance of being reelected is so irresponsible as to disqualify him from being a Parish Councillor, let alone Prime Minister.
It remains to be seen whether the present Labour leadership are capable of doing this - done intelligently it could be a winner for Labour, the majority of British voters realise what reality is, as they did in 1975, when faced with the crunch.