"The more firsts and upper seconds a university awards, the higher a ranking is likely to be," he said. "So each university looks closely at the grading criteria used by its league-table rivals and - if they are found to be using more lenient grading schemes - the argument is put about that 'peer' institutions must do the same." The number of first class degrees has leapt by more than 100 per cent in 10 years, from 16,708 to 36,645, despite only a 40 per cent increase in the number of undergraduates.