A FORMER martial arts instructor who was jailed on Thursday for sexually abusing a young boy had already been given 12 years’ worth of jail time for similar offending.

Predatory Colin Stratton, now 62, was given 21 months by an Oxford judge this week after he admitted nine counts of indecent assault and gross indecency between the years 1984 and 1992 on two boys.

One of the boys had been touched over his clothing by Stratton as he was taken to karate classes in Shrivenham. The boy, now a grown man, said he had been warned not to tell his mother what had happened.

READ MORE: Swindon paedophile karate teacher jailed after sex attacks on boys

The offences bear similarities with crimes the former karate tutor has been jailed for in the past.

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Colin Stratton's custody shot Picture: WILTSHIRE POLICE

In 1997, he was sentenced to six years’ imprisonment after a jury convicted him of raping a boy under 16, attempted rape and indecent assault.

He was subsequently convicted of possessing indecent images of children.

Then seven years ago, in 2014, a Swindon judge put him away for eight years.

On that occasion, the court heard how the victim first met Stratton when he went to his classes as a boy in late 1989.

The older man carried out a campaign of abuse over the following six-and-a-half years. He would use the classes as an opportunity to assault the boy and assert himself on him.

READ MORE: Former Swindon martial arts teacher jailed for abusing young boy

Stratton’s victim said seeing NSPCC adverts on TV brought it all back and led to him self-harming again. Prosecutor Claire Marlow told Swindon Crown Court in 2014: "He came forward as he doesn't want to live in fear anymore."

When he was questioned by police, Stratton denied the allegations, saying the boy was just repeating what had been said at an earlier trial.

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Swindon Crown Court Picture: ADVER

Jailing him for eight years and imposing an extended licence period, Judge Peter Blair QC accused Stratton of “twisted thinking”.

"The victim impact statement that he made and has been read out is one which tugs at the heart strings,” the judge said.

“I suspect you will never know just how much harm you have caused.”