According to the Guardian, Blunkett states that:

Gordon Brown only offered unequivocal public support for the Iraq War after deciding that Tony Blair would sack him as Chancellor if he did not.

Brown could have brought down the Government, prevented British involvement in the Iraq war, and been a national hero. But Cautious Gordon chose his career above his conscience, although he could have won, had he done the right thing.

At least we now know what kind of leader we're likely to have in the future.

Exactly when that will happen is still uncertain of course, and I have a terrible suspicion that the reason Blair wants to hang on is that he doesn't trust anyone else to support (as he would) a US attack on Iran.