First Minister Carwyn Jones has announced plans to develop a new centre in North Wales to treat babies who need extra care. But he told AMs the most ill babies would still be sent to Arrowe Park on the Wirral for specialist treatment.
He also explained to AMs why he was rejecting proposals in an independent report to treat all babies needing extra care in the north.
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There will be a fresher feel with temperatures falling lower than on recent nights.
The accident between junction 24, Coldra, and 23A, Magor, has closed the eastbound carriageway.
Eloise Parry, 21, died after taking diet pills containing the poisonous Dinitrophenol (DNP).