A fashion designer who has created outfits for stars including Beyoncé, Lady Gaga and Charli XCX hopes her mythology-inspired outfits at London Fashion Week will showcase Welsh heritage to the world.

But what is it? Part social commentary, part Welsh myth and part travelogue, it tells the story of a family from Port Talbot, the Driscolls, who get caught up in a cataclysmic industrial dispute at ...