A report by ECPAT UK claims the British Government is failing to prevent child sex tourism.
While Britain has prosecuted only five sex offenders for child sexual abuse abroad since 1997, the USA has prosecuted more than 50 - and Australia has prosecuted more than 25.
Many paedophiles volunteer to work in orphanages or as teachers.
In 1998, a British teacher working with children in Thailand was sentenced to 33 years for abusing boys.
His sentence was cut and he was deported back to the UK in 2001.
Since then he has taken up various teaching posts in developing countries and is now working in China teaching children as young as five. More...