Arts Editor Eve Jackson and film critic Emma Jones take us through the winners of this year’s Cannes Film Festival, including the Palme d’Or-winning "It Was Just an Accident" by Iranian dissident Jafar Panahi. It was a powerful and symbolic moment for Panahi, who returned to Cannes after a 22-year absence caused by repeated prison terms and travel bans. His film about prisoners confronting their jailer echoes his own fight for artistic freedom.