There is a lot of information on Royal Brierley on this board (Glass Messages). The original company was Brierley Hill Glass Works (founded in 1740). Stevens & Williams company absorbed them at one point but the glass works may have kept their name after being absorbed. Then later, in the 20th century, Stevens & Williams took the name Royal Brierley Crystal after being visited by a royal family member (this may be anecdotal). Sometime more recently, about 1999 or 2000 it was reorganized and Epsom Enterprises took over the operation briefly, failed, started again. The assets were sold to Dartington in 2005.