A former Folkestone deputy head teacher was today given a 14-year extended jail sentence after being trapped on the internet talking about child sex.

Married Martin Locke, 64, thought he was chatting to two brothers-in-law about meeting their step-daughters aged seven and 11 for sex.

The retired teacher arranged to meet the two men at the Moto service station in Medway to organise a possible groping session at a local swimming pool in October last year.

Now a judge has heard that Jason and Nathan were the pseudonyms of an undercover police officer and the two girls did not exist.

But Locke, of Tanner Hill Gardens, Hythe was real - and had been a foster carer to young vulnerable children.

Today he was sent to prison for 10 years and told he will also have to serve another four years on extended licence when he is released.

Locke admitted 22 sex offences, including possessing and distributing sick sex images of children, sex assault, arranging child sex offences – some of the offences involved fostered children.

"You were committing these vile offences against children. The shocking abuse of trust which you have displayed is a very serious matter..." - Judge Adele Williams

Locke sat with his head bowed at Canterbury Crown Court as Judge Adele Williams told him: "You were a teacher all your life and after retiring you became a foster carer. To all intents and purposes you were an upstanding citizen held in high regard.

"In fact, you were committing these vile offences against children. The shocking abuse of trust which you have displayed is a very serious matter.

"You have a perverted, deviant sexual interest in children and you have acted on those interests. You pose a significant risk of causing serious harm to children in the future."

Prosecutor Simon Taylor told of the foster carer's secret world of perversion.

After raiding his home, officers took away an Acer laptop that revealed that Locke had been posing as Micky Green to view images and movies.

"As part of the review of his emails which he had sent from that address was one in particular which he sent to another user," he said.

"In it he detailed an event of a child in June last year who had stayed at his home and he had taken images of the female which she slept.

"In December an officer was reviewing images contained in a Samsung Galaxy belonging to the defendant. That contained 13 images of the same female who was aged approximately 12 years old."

Social services and a fostering agency were later able to identify the victim who had stayed at the house for a few days.

Mr Taylor added Locke had also he had sexually assaulted another 13-year-old who was placed in his care while he was being assessed for his suitability to become a carer.

And another 15-year-old girl in care was given £50 by the pervert for images of her in her "bra and nix".

The prosecutor said the former deputy head had also offered to bring a young child to what he thought were paedophiles and leave her with them - and then watch.

Mr Taylor said other images on Locke's camera included ones he had secretly taken at a local supermarket showing "upskirt" shots of two unsuspecting schoolgirls.

He also confessed to taking a pair of pants from one of the girls in care and meeting up with a "like-minded" individual in Maidstone twice.. when they put the clothing on their heads to "sniff and lick".

Locke was banned from ever working with children under 18 again and will remain on the sex offenders' register for life.