. "Former Casting House and Workshop at Treforest Tinplate Works" . "Treforest tinplate works" . . "Treforest tinplate works" . "Former Tinning House at Treforest Tinplate Works" . "Former Smithy at Treforest Tinplate Works" . "Former Rolling Mill at Treforest Tinplate Works" . . . . . "Workshop NW of Tinning House at Treforest Tinplate Works" . "Leat Retaining Wall at Treforest Tinplate Works" . "tinplate works" .