There are delays of up to an hour on Arriva Trains Wales services between Cardiff Central and Carmarthen due to a signalling problem at Llanelli. There is no current estimate for when a normal service will resume.
Icy by night, chilly by day - brace yourself for a cold week ahead.
High pressure keeps the weather chilly by day, icy by night, with an increasing risk of freezing fog.
High pressure this weeks means mainly cold bright days and icy cold nights.