A man who admitted to 45 counts of rape, sexual assault, and child abuse has received a jail sentence of 13 life sentences. He will not be considered for release until he has served 16 years in prison.
Mark Frost, 70, one of the UK's most prolific predatory paedophiles, will now start a jail sentence for the systematic and calculated abuse of young boys in the UK and in Thailand.
Police believe Frost used his status as a teacher and scout leader in the UK and as a relatively wealthy Westerner while in Thailand to win his victims' trust and admiration.
Frost, previously known as Andrew Tracey, evaded arrest on several occasions before he was apprehended in Spain in 2015 after the UK's National Crime Agency acted on Dutch police intelligence on his whereabouts. He was previously arrested in Thailand in 2013 by the Royal Thai police but fled the country after being released on bail.
Passing sentence at the Old Bailey on Wednesday, judge Mark Lucraft QC told Frost: "It is clear you have an obsession with sexually abusing young boys with evidence of planning and grooming.
"Your conduct was horrific. You are someone who will continue to pose a risk to children."
Ruona Iguyovwe, senior specialist prosecutor at the Crown Prosecution Service, said Frost had caused considerable suffering to his victims over many years.
WATCH: CPS prosecutor Ruona Iguyovwe discusses the Mark Frost case. Frost, 70, was jailed for life for serious chil… https://t.co/AW74Xz8U0Q
Police believe Frost may have abused many more victims in the UK, Thailand, and across Europe, and the NCA said it had received new information about him since his guilty pleas were made public last week.
Kelly Alleyne, child protection manager at the NCA, said: "We know how difficult it can be for victims of non-recent sexual abuse to come forward or seek support.
"Since the guilty pleas entered by Mark Frost, we have had a number of referrals from individuals with information about him and enquiries are ongoing.
"However, we believe there could be many more victims of Frost who have never come forward or spoken to anybody about what happened to them."
Frost was suspended from schools in Worcestershire, Hertfordshire, and east London and served three separate jail sentences in the 1990s.
He was investigated by police in 2012 as part of a crackdown on child abuse, but he left the country before any action was taken.
Police are urging victims of Frost and anyone with information about Frost’s offences to call a dedicated NSPCC helpline on 0800 328 0904.