Teachers unions are calling for an investigation into the low results achieved by youngsters in a pioneering exam in core English Language skills.
The GCSE was designed specifically for schools in Wales after a previous row over exam results. But it's seen the number of candidates getting grade C in one section fall dramatically.
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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).