Meh, enough from me, John at Atlantic Rift has an excellent post up on the reasons Blair gave up on making the case, as usual, it's because he didn't want to alienate the media:
The Labour party, dealing with the realities of government and still having their own doubts, quietly abandoned the cause. There’s little chance of the Conservatives, now led by a nice cuddly Eurosceptic rather than a scary foaming mouthed one, taking up the slack. And the Liberal Democrats are still in no danger of getting into government.Britain's place is within Europe. It has to be. Our press doesn't want to admit it (in fact, Murdoch seems very much in favour of the only sensible alternative, that of an Anglosphere dominated by the Yanks), and our politicians aren't making the case. The opposed are winning by default. Political cowardice of the highest order, but then, populism means saying what they want to hear, not saying what they need to hear, doesn't it Tony?
The splendid isolationism of Farage and his ilk doesn't represent Britain's interests - but while Blair will not explain to the public why, he shouldn't be surprised that they can so dominate debate.