Kain Scott has returned to his home in Ystalyfera. Neath Port Talbot Council sent him, and many others, a letter saying 'it is the Council's strong advice that you should vacate your property until further notice' - but he says 'it's not as easy as that' and he's worried about being burgled.
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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).