A paedophile who made an obscene comment to a 13-year-old boy and was later found to have a knife hidden in his underwear has failed in a bid to reduce his sentence.

Jason Morgan flouted a court ban, imposed after he was found to have sickening images of youngsters, by approaching the teenager at a skate park in Isleworth last April and making the lewd remark.

When the 28-year-old, of Heston Grange, Heston, was arrested, police found a knife hidden in his underwear and further indecent images on his mobile phone.

He was jailed for 30 months after being found guilty, in August last year, of breaching a Sexual Offences Prevention Order (SOPO), banning him from having any unsupervised contact with children.

He was given additional jail terms for 20 counts of possessing indecent images of children and having a bladed article - all of which he admitted - resulting in a total sentence of four years.

His lawyers today (Thursday, February 6) argued his jail term for breaching the terms of his SOPO was 'too long' and urged judges sitting at London's Criminal Appeal Court to reduce it.

But, rejecting his appeal bid, Judge Keith Cutler QC said there were 'no arguable grounds' for challenging the sentence.

The judge told the court Morgan was handed the SOPO in February 2012 when he was jailed for 50 months at Isleworth Crown Court for 14 counts of having indecent images of children.

In April last year, shortly after his release, he went to a skate park in Isleworth, where he sat drinking from a bottle of vodka.

He approached a 13-year-old boy and, after making a lewd comment, asked him to move closer towards him.

The boy ignored him and told his friends what had happened. They reported the incident after noticing Morgan was still hanging around outside the park entrance an hour later.

Morgan was arrested nearby and officers found a knife concealed in his underwear, and a search of his mobile phone revealed he had downloaded and stored indecent images of children on it.

The crown court judge said he deserved a substantial jail term for such a serious and flagrant breach of a SOPO, as a message had to be sent to deter others.

Morgan's lawyers argued the 30 months imposed for the breach was over the top in all the circumstances.

But Judge Cutler, sitting with Lady Justice Rafferty and Mr Justice Collins, refused his appeal bid, saying: "We have come to the conclusion that there is no arguable ground of appeal against this sentence."