Seven GCSE pupils at Oundle School achieved a clean sweep of grade 9s.
For the second year running at the fee-paying school there has been a rise in the proportion of top grades awarded, with 59 per cent of all grades awarded a 9 or 8.
Across the curriculum 30 per cent of all grades were a grade 9, a greater number than in any other band.
English, classical Greek and religious studies provided the headline results with more than 70 per cent at grades 9 or 8.
More than half of the English language candidates secured grade 9
Sarah Kerr-Dineen, head of Oundle School, said: “I greatly admire the way that the pupils and their teachers have risen to the challenge of a changing landscape, culminating in particularly strong and well-deserved results.”