Blair's final act of betrayal?

Iain Dale has commented on this story that Tony Blair may sign up to the revised EU consitution without a referendum.

Up until now I have refused to get on board with any campaign to leave the EU. It has always been my personal belief that the best way forward is to seek changes that return power back to member states so it goes back to being a Europe of trading nations.

I have to say that if Blair does commit this deed I may change. I fear we will have gone beyond a point where revision is feasible and the only option will be withdrawal.

I wonder how many other people will feel the same way? Not only will this be an act of betrayal and deceit on the part of Blair (no surprise there then), his final act might actually be the final nail in the coffin for the EU which he adores.