Ellie Harrison and Matt Baker head for South Wales' Gower Peninsula. Ellie visits Swansea Docks to see how its once filthy waters are now so clean that mussels thrive there. Show more
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Ellie Harrison and Matt Baker head for South Wales' Gower Peninsula. Ellie visits Swansea Docks to see how its once filthy waters are now so clean that mussels thrive there. Show more
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