Students set to receive their BTEC results on Thursday will no longer do so after a change in the system less than 24 hours before grades were due out.
Schools and colleges have been told not to issue the results of the vocational and technical qualification following a last-minute U-turn on grading.
Exam board Pearson wrote to education leaders expressing concerns about "unfairness" in the system in light of the government's similar 11th hour U-turn on A-level grades last week.
On Wednesday, schools and colleges received an email advising their student's BTEC grades would be "reviewed and where appropriate, regraded".
Pearson said it would work "urgently" to get the grades out to young people, but did not but a timescale on when that might happen.
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