David Cameron re-launched his idea of the Big Society this week, though he didn't call it a re-launch.

So do we all feel we have heard it and crucially do we we understand it any better?

And are they worth the effort?

Lance Price, former Blair spin doctor and author of 'Where Power Lies' and Anne McElvoy, executive editor of the London Evening Standard discuss the what goes into a successful relaunch of a campaign.

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