The old Loughor Viaduct has been replaced and work is focusing on laying two tracks through Gowerton for the start of services on Monday.
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A dry night with clear spells for most, especially towards the north where it will become rather chilly with some mist patches possible.
Wales head coach Warren Gatland says some players suffered a few bumps and bruises during their clash against Ireland.
Hundreds of bikers have ridden through Blackwood in memory of a woman killed in the Tunisian terrorist attacks.