Are you happy? We can help! Five Prime Ministers ago, David Cameron started a Happiness Index to measure how joyful the people of this nation are. Which is ironic, given what he then did. Anyway, we've picked up the baton and now are trying to find out what the hell we should do with it. A new personal and political show about our desire, and the country's struggle, to just be happy. 'An hour of glorious chaos. Must-see' ***** (Sunday Post). 'Wickedly funny' **** (Times). 'Irresistible' **** (Guardian).