A County Durham man who tricked children across the world into sending him nude selfies then blackmailed them into sexually abusing young relatives on camera has had four years added to his jail sentence.
Paul Leighton, 32, from Malvern Crescent, Seaham, watched byvideo link from prison as three judges at the Court of Appeal in London raised his 16-year prison term to 20 years.
Spray-painter Leighton, who created up to 40 fake Facebook profiles to befriend teenagers in the UK, Canada, the US and Australia, admitted more than 20 offences, including rape, blackmail, causing a child to engage in sexual activity, making indecent photographs of a child, and sexual assault.
One 14-year-old from Florida was tricked into believing he was talking to agirl, then blackmailed into repeatedly raping his one-year-old niece.
Leighton threatened the teenager that he would post videos of the abuse online if he did not do more.
Increasing his sentence on Thursday, Lord Justice Holroyde said of the crimes:
"They involve sexual offending of a most serious and disturbing kind which has caused grave harm to a number of victims."
The judge said: "The offences involved the cynical manipulation of adolescent victims by communications over the internet, coupled with the use of blackmail."
Lord Justice Holroyde said the fact that he used some victims "to commitserious crimes against other victims - in one case a baby" made the overallpicture one of "very grave offending."
The trial judge was faced with an "unusual and difficult sentencingexercise", and he was "plainly entitled" to reach the conclusion thatLeighton was a "dangerous offender".
The court was in "no doubt" that 16 years was unduly lenient. As well asincreasing the custodial term, the judges added one year to his six-yearextended licence.
Mr Buckland said in a statement: "This is a deeply disturbing and seriouscase.
"Leighton callously targeted vulnerable children and subjected them to aseries of threats, frightening them into complying with his sexual demands.
"Such terrible offending deserves a tougher punishment and this increasedsentence takes into account the seriousness of this offending."