The government and academic institutions have been called upon to address the shortage of university places.
Dr John Dunford, general secretary of the Association of School and College Leaders, said: "There is a real concern about the lack of university places this year."
The impact of the recession requires that "the government and universities make it a priority to fund additional places for students who want to go to university", he added.
Earlier this week saw reports from admissions service Ucas suggesting more than 141,000 students are still seeking university places through clearing.
This year's results saw a record-breaking number of top grades awarded with more than one in four being A-grades.
While traditional subjects such as maths and English are still the most popular choices, this year also saw an increase in numbers opting for advanced maths and science courses.