A Lincoln school has launched an internal investigation into allegations that a teacher’s advice breached exam rules.
Branston Community Academy is trying to determine whether pupils would need to take the exam again.
Four pupils have already had their exams delayed, and the national exam board are investigating.
The secondary school was unable to confirm if the teacher in question (who has not been named) has been suspended.
Branston Community Academy, four miles from the centre of Lincoln, was rated Outstanding by Ofsted in 2016.
A spokesperson for the school said: “An internal investigation has been launched after senior staff at the school were made aware of some alleged irregularities in relation to advice offered to students taking a foreign language oral examination.
“The examination board has been informed. As a result four pupils have had their exam delayed by a few days and we are awaiting a decision on the exams already taken by a handful of other pupils.
“No other students or exams have been affected.”