Bettany and Ben visit the massive ancient monument known as Maiden Castle in Dorset, where their aerial investigation uncovers a story of prehistoric life, death and survival as the Romans invaded Britain. The eye in the sky reveals that this was one of the greatest construction projects of its time and shows just how difficult any assault would have been. On the ground, Bettany discovers evidence that builds a picture of how Iron Age Britain prospered and then succumbed to the Roman way of life.

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Tags: ITV, Secrets, from, the, Sky