Michael Barry, the headteacher of St Matthew Academy in Blackheath, London, tells ITV News that Ofqual's findings have "tarnished the teaching profession" and says the body should have resolved the issue by re-grading the GCSE English exams.
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Michael Fallon has received reassurances from his US counterpart that security ties with Britain will "endure" following a vote for Brexit.
On Friday, police said it appeared the girl had shot herself in the face with the weapon.
The showers will be slow-moving, heavy and thundery at times, particularly in central and eastern areas.