Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. The original case, heard at Bristol Crown Court, saw Slade convicted of 13 offences against children between the 1960s and 1980s.Douglas Slade, then 75, was expelled from the Philippines in 2015 and brought back to the UK to be charged with the offences.Slade, formerly of Sea Mills and Totterdown in Bristol, was convicted of all charges and the offences, committed in Bristol and other parts of the country, were against five children – the youngest aged 10. Slade moved to the Philippines in 1985. He is said to have bought a house in a poor neighbourhood and locals complained he was preying on children, luring them into his home to abuse them.Despite a number of investigations, he was never prosecuted in the country, and it wasn’t until he was extradited to Britain that he faced justice. The youngest of the five suing him through the High Court in London was 10 when he was allegedly abused and one told the BBC he was “repeatedly” attacked by the paedophile. He said: “Many people avoid me and think that I have a disease because of what I did. I’m teased. I am too embarrassed to get out of the house.”It is hoped the case will serve as a warning to paedophiles travelling abroad to sexually abuse children in countries where the judicial system is lax or flawed. As he was sentenced at the end of his recent trial, the judge said Slade had “boasted of his involvement” with PIE.The group campaigned for “children’s sexuality”, calling on the government to axe or lower the age of consent so that adults could have sex with children without breaking the law.It existed for more than 10 years and received invitations from student unions, won sympathetic media coverage and found academics who supported its campaign. It was even affiliated to the National Council for Civil Liberties – now Liberty.The group disbanded in 1984 after the authorities acted and PIE’s chairman Tom O’Carroll was jailed for two years. A British paedophile who set up an advice helpline for other child molesters is being sued for damages by five Filipinos who claim they were sexually assaulted by him in their home country. Douglas Slade, 77, was jailed for 24 years in 2016 for his abuse of five boys while living in Britain. Now, in what is believed to be the first case of its kind, four men and one teenage boy are to give evidence from Manila about the “personal injuries arising out of sexual abuse” they say they suffered at the hands of Slade. The original conviction related to offences between 1965 and 1980, during which time he campaigned for the age of consent to be abolished, allowing adults to have sex with children legally. He was also actively involved in the pro-paedophile activist group Paedophile Information Exchange, and during his trial it was said he was running a helpline for child sex abusers from his parents’ Bristol home in the 1960s and 1970s.On Tuesday, the High Court will hear what is thought to be the case involving foreign victims – who will appear via videolink from the Philippines – suing a British national for alleged sexual abuse that happened abroad.