http://www.bbc.co.uk/iplayer/episode/b00nvhvn/All_in_the_Mind_17_11_2009/
"In a special edition, Claudia Hammond talks to the father of positive psychology, Professor Martin Seligman, about why optimism is not only good for your health, but could also help you live longer. Claudia visits a school which has introduced happiness lessons with some surprising results..."
