More than half a million pupils face a fresh round of results chaos after exam board Pearson pulled its BTec results on the eve of releasing them.
Pearson said it would be re-grading all its BTecs to bring them in line with A-levels and GCSEs which are now being graded via school-based assessments.
The 11th-hour move affects 575,000 pupils, 250,000 of whom received grades last week.
The rest were due to collect results on Thursday along with GCSE candidates.
Pearson said in a statement: "BTec qualification results have been been generally consistent with teacher and learner expectations, but we have become concerned about unfairness in relation to what are now significantly higher outcomes for GCSE and A-levels."
England's exams regulator has already said that the school-assessed GCSE and A-level grades are likely to be higher than last year by nine and 12 percentage points respectively.