 The South Wales Railway was planning a trunk main line from near Gloucester to Fishguard.The Llanelly company attempted to sell its line to the South Wales Railway, but that approach did not bear fruit, and in January 1850 a contract was made with Ianson, Fossick and Hackworth to work and maintain the line.They operated a through passenger service between Swansea and Llandilo from May 1850, consisting of omnibuses at each end and railway transit from Pontardulais and Duffryn.