Melvyn Bragg and guests discuss the Celts. Around 400 BC a great swathe of Western Europe from Ireland to Southern Russia was dominated by one civilisation. Perched on the North Western fringe of this vast Iron Age culture were the British who shared many of the religious, artistic and social customs of their European neighbours. These customs were Celtic and this civilisation was the Celts.The Greek historians who studied and recorded the Celts' way of life deemed them to be one of the four great Barbarian peoples of the world. The Romans wrote vivid accounts of Celtic rituals including the practice of human sacrifice - presided over by Druids - and the tradition of decapitating their enemies and turning their heads into drinking vessels.But what were the Celts in Britain really like? Was their apparent lust for violence tempered by a love of poetry and beautiful art? How far should we trust the classical historians in their writings on the Celts? And what can we learn from the archaeological remains that have been discovered in this country?