There does not appear to be a great deal of history written on Llanlleiana. From what I have read, the works processed deposits of china clay found on Dinas Gynfor into porcelain. The works were relatively small, consisting of only one building and the remote chimney. The works closed in 1920 after they were damaged by fire.
If you know any more info on the works, please leave me a comment.
For a look around the works, please watch my video below.
Thanks for reading.