POLICE investigating a Hampshire teacher who began a relationship with a pupil and kept a sex dossier on other students have made an arrest.

Hampshire Police has confirmed that a 39-year-old man was arrested as they continue to look into the case of Tyrone Mark, who taught at Arnewood School, in New Milton.

A spokesperson for the force said that the man, who has not been named, was detained in Caerphilly and held on suspicion of breach of trust offences. He has been bailed until June 2015.

It comes a month after education chiefs passed vital files to detectives investigating geography tutor Mr Mark.

As previously reported, Mr Mark was sacked and banned from teaching for life after school bosses were alerted to the friendship between him and a female student.

Mr Mark, 39, who taught at The Arnewood School, was found guilty of professional misconduct and barred from teaching by the National College for Teaching and Leadership (NCTL).

A disciplinary hearing was told he gave the teenager alcohol, condoms and even a key to his house.

He also wrote sexually explicit notes about many of her fellow pupils - some of whom featured in school photographs he kept at his home.

Mr Mark, who lived in Dorset, is understood to have taught at Arnewood for about ten years.

He was summoned to a meeting with head teacher Chris Hummerstone in December 2012 and admitted giving the girl alcohol, condoms and his backdoor key. He also took her on two outings to Bath without her parents' knowledge.

A spokesman for The Arnewood School said at the time: “We have acted with complete propriety and in good faith in this difficult case, closely following established protocols.

“We will happily assist the police with any inquiries.”