Chief regulator Glenys Stacey says Ofqal has noticed a pattern in appeals of exam results from schools.
The analysis that we have done has shown that there is tactical appealing at critical grade boundaries - C/D at GCSE and B/A at A-level, that doesn't mean that every appeal at that boundary is tactical, but you can see from the pattern that it would suggest there is tactical appealing.
Secondly, the way the appeal system is designed at the moment, and indeed headteachers agree with us, that where you're within a couple of marks of such a grade boundary it's worth appealing because it is a one-way bet.
More top news
Katie Price has defended using the n-word on live television after saying it twice on This Morning.
The 'obsessive and manipulative' stalker was found guilty of murder after his ex was found with cuts to her throat as deep as her spine.
A source close to the Labour leader ruled out his participation in any head-to-head debates which do not involve the Prime Minister.