Excellent report and photos.
Very saddened to hear 42 workers with 900 years work experience just cast out into the gutter like rubbish in the name of corporate greed.
Yes they did make drain pipes here, was part of Glynwed Foundries.
I have several 1980’s/1990’s catalogues from them, the best known product was Glynwed Timesaver soil and drain pipes, also old style cast iron guttering and down pipes.