A TEACHER who posed as a lawyer in a bid to send child abuse fantasies to a jailed paedophile has been locked up for three-and-a-half years.

Robert Lightband, who had taught history at Menzieshill High School in Dundee, tried to con prison guards at HMP Perth into passing a 14-page document containing “graphic and distressing” descriptions of the abuse of children to Jason Jordan.

The serial sex offender was just starting a four-year jail sentence as part of an order for lifelong restriction order for possession of child porn.

Lightband, who was jailed last year for his second child porn downloading offence, wrote “legal correspondence” on the front of his letter, which purported to come from an Edinburgh law firm called Goodwin Moir.

Letters between solicitors and their clients are not usually opened by jail staff for confidentiality.

But prison guards were suspicious because the “legal correspondence” line was handwritten and the letter was not franked as legal letters usually are.

An investigation revealed the firm did not exist.

Inside they found a two-page letter purporting to be from “Robert Lightband solicitor”.

More disturbingly, a 12-page document was attached in which Lightband spelled out depraved fantasies to Jordan, whom he had “acquainted” in Perth Prison’s sex offender unit.

A court insider said: “The letter was far too graphic to be read in court.”

Procurator-fiscal depute Vicki Bell told Dundee Sheriff Court Lightband had been released from jail in May, and confessed he had immediately began downloading child porn once released.

Sentencing, Sheriff Alastair Carmichael also placed Lightband on the sex offenders register for 10 years and imposed a 10-year sexual offences prevention order.

The sheriff said: “This is an an attack on the solicitor- client relationship.”