Traffic has returned to normal, the rolling road block has been lifted and emergency repairs completed on M4 Westbound between J25 A4042 / B4596 (Caerleon) and J26 A4051 (Malpas Road).
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Any heavy showers will clear away northeastwards through late evening.
The Scarlets were comprehensively beaten 38-16 by Leinster in Dublin.
Cardiff Blues survived an onslaught from Pau's powerful pack to book a place in the European Challenge Cup final.