Thirteen pupils missed out on their first choice university places because of a “very disappointing” mistake by the AQA exam board, the qualifications watchdog has revealed. Ofqual found that “management failings” in the introduction of an on-screen marking system meant some A-level and GCSE candidates’ work was not assessed. A total of 3,353 pupils got the wrong marks and 622 had incorrect grades that have now been corrected. Of the pupils who missed out on their favoured university, 11 found a second choice or clearing place but two were not placed at all.