The OCR examination board says students taking GCSEs this year had the same chance of getting the same grade as last year.
OCR's Chief Executive Mark Dawe says the results for 16-year-olds are relatively stable but the overall picture is being affected by younger pupils taking exams early.
More top news
Clear spells overnight will lead to widespread frost and ice, with a few mist patches by Sunday morning.
Police are appealing for witnesses after a female pedestrian died following a hit and run collision in Essex.
Union officials are holding talks with administrators in an effort to save thousands of jobs following the collapse of City Link.