Santander – Carmarthen – Opening Hours & Store Details You will find Santander situated in an ideal spot in Darkgate Centre at 2 Dark Gate, approximately 0.18 miles south-east of the centre of Carmarthen (not far from St. Peter’s Church and New Market Hall (2009)). This store serves the customers of Johnstown, Carmarthen Junction, Abergwili, Carmarthen Bridge Junction, Carmarthen Town Centre, Llangynnwr and Pensarn. This page will give you all the information you need about Santander Carmarthen, including the hours of operation, location description, product ranges and further details.