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The actor operates one of the world's biggest hydraulic cranes, gets behind the wheel of a tank, and discovers the story behind the invention of the hovercraft.
David examines British innovations in the history of flight, from the first glider to the modern jet suit, and discovers how Britain contributed to the moon landing.
The actor examines British innovations in the home from the lightbulb to the lawnmower, and discovers the role Queen Victoria played in creating the telephone.