Paedophile Neil Foden tried to prevent an investigation into serious allegations against another teacher at his school in Bangor, a union official has claimed.
Colin Adkins told a new TV documentary he was shocked by the minutes of a strategy meeting which had been accidentallly sent to him.
The S4C programme, 'Foden - O Brifathro i Bedoffeil', which examines the crimes of the disgraced ex-Ysgol Friars headteacher, airs on Tuesday night.
“There were serious allegations in respect of a teacher being allegedly in a totally inappropriate relationship with four pupils, one going back at least three years,” Mr Adkins said.
“Quite clearly, any sexual relationship between a teacher and a pupil is not only inappropriate, it’s sexual abuse.”
Mr Adkins, a regional officer at the NASUWT, said the strategy meeting did not take the appropriate steps.
“When I honed down into the considerations that were laid at this meeting, I clearly saw that Foden manipulated the process to prevent these allegations being independently investigated,” he added.
The governing body was not aware of the allegations against the teacher.
Journalist Bryn Jones, who has been investigating the claims,said there was a separate allegation against a different teacher that he had a “kiss with a school pupil” on a night out, but he denies any wrongdoing.
The programme reveals that the teacher reached a deal with Neil Foden to resign, and in return, he would receive a reference from the headteacher, and that the governors’ investigation into the allegation would come to an end before being completed.
“He didn’t see a future for him at Friars [the school where Foden was headteacher] because Neil Foden, he didn’t think, was going to give him a fair hearing,” Mr Jones said.
“He didn’t want to be there, and so on that basis he decided ‘Right, I want to leave’.
“The main thing coming out was, whether or not he was telling the truth, he had been able to go with a reference, before the disciplinary process had concluded, so without them having properly looked into it.”
North Wales Police continue to investigate allegations of abuse by Neil Foden and have arrested two other men following the 2025 investigation.


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