The row over this year's GCSE English grade boundaries shows no signs of abating after Ofqual said the qualification would not be regraded.
The regulator admitted grade boundaries were higher in June than they were in January, but insisted it would be "inappropriate" to reconsider either of them.
Headteachers are considering today whether to mount a legal challenge over GCSE English.
The exam regulator says GCSE English exams were graded generously in January, but it found no problem with the boundaries set for June.
England's exams watchdog, Ofqual, is to set out its initial findings on the row over English GCSEs.