The Pembroke and Tenby constructed a west curve at Carmarthen, enabling through running from the Whitland direction into Carmarthen Town; this was known as "the P&T Loop". The Act for the independent line to Carmarthen authorised this and an extension into Carmarthen Town station, but the latter part was surrendered by the P&TR in view of the use of the GWR line. Carmarthen gave the P&TR access to the Llanelly Railway and Dock Company, which had reached there in 1865 from Llandilo to Abergwili Junction, managing the last mile or so over the Carmarthen and Cardigan Railway. The Llanelly Railway was to connect at the north end with the Central Wales Line and ultimately the London and North Western Railway.