Education Secretary Michael Gove has admitted students who sat GCSEs this year were treated unfairly, following the grade-boundaries row.
But he added it was beyond his remit to order the grade boundaries be adjusted.
Many schools have threatened legal action, after the boundaries between C and D in English GCSEs were were moved part way through the year.
He told John Humphrys: "My heart goes out to those students who sat the exam this year because I don't think the exam was designed in the most appropriate way".
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