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. A powerful and symbolic moment - Panahi, long banned and imprisoned in Iran, hasn’t attended Cannes since 2003. His searing film about prisoners confronting their jailer echoes his own fight for artistic freedom.