The Dunlop Semtex Rubber factory was initiated by Lord Forrester, who wanted to bring large scale post-war work to the south Wales Valleys after the Depression in the 1930s. Erected between 1947 and 1953, it was considered to be the most inventive industrial building of its time, and was the first structure to be granted listed status after the end of the Second World War. Central to the plan, and the greatest feat, structurally and aesthetically, were the nine domes covering the central production area. One of the main architects, Ove Arup, learned from the experience and used it as inspiration for the Sydney Opera House.
The factory ceased production in 1982. In 1986, the main factory structure was listed grade II* as a building of special architectural or historic interest. The associated boiler house was listed grade II. Despite this, the main building was bulldozed in 2001 to make way for a £35 million mixed retail, housing and business complex. The boiler house is all that remains.