Disgraced Suzanne Harrison, 46, became close to a member of Pupil A’s family while she was teaching Geography in Essex between 2004 and 2006. When she was looking after the schoolgirl they had a sexual encounter.Now, the Teaching Regulation Authority (TRA) said a relationship between the underage pupil and Harrison continued for four years afterwards. But that wasn't all, the TRA later added: “In October 2009, Ms Harrison introduced Pupil A to her then partner, Person B, who then began a relationship with Pupil A.

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“In time Pupil A disclosed the fact of her past relationship with Ms Harrison to Person B.” Harrison was arrested after her ex-partner and the girl’s mum told the police in 2011 about what had happened. She quit her job in July of that year and one month later Harrison pleaded guilty to four offences of sexual activity with a child while in a position of trust at Ipswich Crown Court.

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TRA chairman Alison Robb-Webb said: “The panel noted that the behaviour involved in committing the offence involved the most severe breach of boundaries, not only as a teacher, but also a friend of Pupil A’s family.

“Whilst there is no evidence of an effect on the wellbeing of the pupil, Pupil A was brought into a sexual relationship at an age where by law and for her own protection that relationship was criminalised.“Ms Harrison’s actions involved a double abuse of trust.”