Tonight's programme comes from Bangor, North Wales. ' Wales has been invaded many times. Romans, Vikings, Normans -you name them, we've been overrun, battered and besieged by them.' The modern invaders are more in the form of caravans, second-home owners, pollution and nuclear power stations. Tonight the empire strikes back ... Music from The Raincoats and Fay Ray and a clip from the controversial film The War Game.