Tony and the team are in Swansea. The city used to lead the world in copper smelting, but today there's almost nothing to be seen of this unique heritage. They team investigate one of the very first copper works, White Rock. Two hundred years ago, Swansea was one of the wealthiest cities in the country, if not the world. The source of those riches was neither the coal nor the steel recently associated with the area, but copper. The Welsh port city once led the world in copper smelting, but today there's almost nothing to be seen of this unique heritage. So Tony Robinson and the Team investigate one of the very first copper works, White Rock.