A 48-year-old father-of-three was trapped by an online paedophile investigator when he arranged to meet a 14-year-old child called “Little Laura” after grooming her on the internet, Bradford Crown Court heard.

Donald Campbell, a Royal Mail computer software engineer, was filmed on a camcorder when he turned up in a park to meet the “schoolgirl” and the evidence handed to the police.

Campbell was brought in custody to court yesterday afternoon to be sentenced for attempting to meet a child following sexual grooming, between June 26 and July 10 last year, and 11 charges of making indecent images of children.

Prosecutor Richard Smith said Campbell, of no fixed address but formerly of Glendale Close, Buttershaw, Bradford, called himself Don Campbell NSA to speak to “Little Laura” on the Badu internet chat site.

Mr Smith said NSA stood for “no strings attached.”

Paedophile exposer Griff Roberts set up the “Little Laura 18” identity to trap perverts into revealing themselves.

The court heard that “Little Laura” told Campbell she was 14 the first time they chatted.

He said he was looking for “a regular young girl” and asked for her breast measurements and if he could touch her sexually.

On June 28, he asked for “a sexy pic” and told “Little Laura” he wanted her to wear a thin top when they met.

Campbell went to Shibden Park, Halifax, on July 9 thinking he was going to meet the child, after telling her: “I want you bra-less.”

Instead, he encountered Mr Roberts who filmed their meeting, in which Campbell admitted he was there to meet “Little Laura”.

The camcorder footage and evidence of the internet conversations were handed to the police.

Campbell told detectives he was drunk every night when at his computer.

Police seized computers from his home that contained more than 50 child porn movies as well as indecent photos of children.

Mr Smith said the films showed infants as young as four and adults having sex with children.

In mitigation, Campbell’s barrister, Jayne Beckett, said he had been in prison on remand for six months.

“There was a real element of entrapment as far as the case was concerned,” she said, adding: “He has a wife and children and desperately needs rehabilitating.”

She said Campbell was not allowed back to the family home or to have unsupervised contact with his two children and stepchild.

Judge Colin Burn sentenced him to a three-year community order with supervision, including 60 days of high intensity treatment for sex offenders.

“You have fallen prey to offending that is considered by every member of the public as abhorrent,” he said.