Legal action is being launched against the NHS over the prescribing of drugs to delay puberty.
Papers have been lodged at the High Court by a mother and a nurse against the Tavistock and Portman NHS Trust, which runs the UK's only gender-identity development service (Gids). Lawyers will argue it is illegal to prescribe the drugs, as children cannot give informed consent to the treatment.
The Tavistock said it had a "cautious and considered" approach to treatment.
The nurse, Sue Evans, left the Gids more than a decade ago after becoming increasingly concerned teenagers who wanted to transition to a different gender were being given the puberty blockers without adequate assessments and psychological work.
Ms Evans said: "I used to feel concerned it was being given to 16-year-olds. But now, the age limit has been lowered and children as young as perhaps 9 or 10 are being asked to give informed consent to a completely experimental treatment for which the long-term consequences are not known."
Source: BBC News, 8 January 2020