A trustee of the charity Mermaids has resigned after reports he spoke at a conference organised by a group that promotes support for paedophiles.
Dr Jacob Breslow quit the transgender children's charity after the Times revealed he had attended the B4U-ACT conference in 2011, as a PhD student.
B4U-ACT calls for paedophiles to have the right to live "in truth and dignity".
Mermaids says the organisation is "completely at odds" with its values.
B4U-ACT's website says it holds workshops and gives presentations about the needs and rights of people "with an attraction to children and adolescents", and runs support groups for both them and their friends and family members.
The abstract of a presentation Dr Breslow is understood to have given uses the phrase "minor-attracted persons" instead of paedophile.
Dr Breslow is an associate professor of gender and sexuality at the London School of Economics (LSE).
https://www.bbc.co.uk/news/uk-63137873