Experts warned that if grades had been allowed to continue to increase, exams would become worthless. Students were helped by a number of unprecedented adaptations to mitigate the impact of Covid, including being given advance information about the content of some exams to enable them to focus their revision and being allowed to take support materials, including formulae and equation sheets, into some exams. Papers were also graded more generously than ever before, which is why results were higher than when exams were last taken in 2019.