A man described as “a dangerous predator to innocent children” had his sentence increased after new evidence of sexual assault was presented to the court.

Kevin Jones, 56, who is serving 14-and-a-half years in Pentonville Prison, was sentenced at Snaresbrook Crown Court on Tuesday.

He was charged with 12 counts of sexual abuse, including six counts of indecent assault on a male person, two counts of inciting a child under 13 to engage in sexual activity, two counts of engaging in sexual activity in the presence of a child and two counts of sexual assault of a child under 13.

He pleaded guilty to all charges.

The assaults took place repeatedly between 1977 and 1983 and between 2009 and 2011 against two young boys at a variety of locations in the borough.

This comes after Jones was convicted and sentenced in June to sexual abuse against two girls at Basildon Crown Court.

This included at least 20 occasions of oral rape against a girl under 13 and sexual assault in the late 1970s.

One of the victims “collapsed in court” during the first trial and was “terrified of giving evidence”, later telling the court no one knew the extent of the abuse, Judge Louise Kamill was told.

In the latest case, victims were inappropriately touched and received oral sex, the court heard.

Jones is said to have told a victim, “don’t be afraid, you are going to like what’s going to happen”, “it feels good – you don’t need to worry about it, it’s completely natural” and “there is no need to tell anyone about it”.

Jones was described by Judge Kamill as “a man of considerable size – possibly frightening to children”.

She sentenced Jones to two-and-a half-years for each count to run concurrently and consecutively to his current sentence.

Judge Kamill called Jones “a dangerous predator to innocent children” and added the sentence did not reflect the seriousness of the offences, but she was constrained by the totality of the case against him.

“The courage of those people coming forward is to be applauded and we all hoped that the consequences they have been through will be diminished and possibly repaired in the future,” she added.