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Hidden Wales with Will Millard Series 1, Episode 1 Clips

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  1. Will explores the wreckage of the world's first mechanically-powered submarine

    Duration: 02:48

  2. Will explores a slate quarry that once housed priceless artworks during WWII

    Duration: 01:57

  3. What's lurking at the bottom of the sea off the coast of North Wales?

    Duration: 01:11