 With opening of the dock and the Dafen line in 1834, the Directors were already thinking of a railway line northwards from Llanelly and Llangennech to Llandilo.Such a line would open up access to known important coal deposits in the valley of the River Amman, and Llandilo was an important agricultural centre.The necessary Act was passed on 21 August 1835, and the Company was retitled the "Llanelly Railway and Dock Company".