A music teacher sexually abused a 15-year-old boy in Holmfirth after giving him lessons on how to play the trumpet.

Derek James Green had “groomed” the teenager by previously showing him pornographic magazines and Polaroid photos of himself naked or on occasions engaging in sexual activity with his wife, Leeds Crown Court heard today - Tuesday.

He had also given him money back from the fee paid for his lessons.

But on the day concerned he took the youth up to his loft and engaged in sexual activity with him.

Matthew Bean, prosecuting, said the boy knew it was wrong and felt uncomfortable and stopped Green but was so traumatised by what had happened he felt he could not speak about it to anyone.

Shortly afterwards Green stopped teaching him but the impact lingered on through the victim's adult life until he eventually felt able to report the incident to police in 2013, more than 20 years later.

By then Mr Bean told the court Green had received a prison sentence imposed in 1999 for offences against another of his music pupils, a girl under 16 with whom he had sex.

He said the youth victim in the earlier offences described how he had confided in Green after being bullied at school and thought the teacher was kind.

The abuse had left him with a deep sense of self-loathing. For a time he became a binge drinker and had difficulty with relationships.

Simon Killeen, representing Green, said after his release in 2000 he had sought counselling for his behaviour and there had been nothing since.

He had not been able to return to teaching only to “menial employment” such as his current job of pushing trolleys in a supermarket “which he says he deserves.”

He suggested there was no need for Green to be sent back to prison.

“Perhaps the public would be better served by allowing him to be punished in the community with the additional protections and restraints that the Probation Service set out,” he said.

Green, now 60, of Lon Derw, Abergele, Wales, admitted two offences of indecent assault in the 1980s.

Jailing him for 14 months Judge Guy Kearl QC said immediate imprisonment was required because of the effect on the victim and his life since.

He was a child at the time.

“He was vulnerable and you took advantage of that,” the judge said.

He accepted those offences had happened before his sentence involving the girl “who was also it turns out your pupil” and there had been nothing since his release from that jail term but it was a serious abuse of trust.