A tape alleged to show Prince Harry cheated in an exam is not enough evidence for a new investigation, an exam board insists.
The Royal Family has strenuously denied there was any cheating
The tape did not warrant a probe into a teacher's claims he was helped to write AS-level art coursework, Edexcel said.
It was secretly recorded by former Eton art teacher Sarah Forsyth and came to light at her employment tribunal on Thursday.
She is claiming unfair dismissal and sexual discrimination.
Her contract was terminated in June 2003.
Miss Forsyth alleges she helped Prince Harry write an AS-level piece of coursework when he was a pupil at the school.
On Thursday the tribunal heard she recorded a conversation with her royal pupil in an attempt to fight her pending dismissal from Eton College.
She claims the tape incriminated him in exam cheating and that she had been instructed to write text to accompany pieces submitted in the prince's
On her transcript Harry allegedly said of the AS-level piece "..tiny, tiny bit...I did about a sentence of it".
Clarence House has dismissed the allegations as unfair and unfounded.
Eton says the tape is inaudible in parts and the whole issue is irrelevant to the unfair dismissal case.
Edexcel, the exam board responsible, said it had reviewed the tape. It said it was not enough to merit the board reopening an investigation, which it carried out into the matter last year.