Campaigners in legal effort to suspend trial of puberty blockers in England

Letters arguing research could harm participating children sent to medical regulators, health secretary and NHS

Campaigners have begun a legal process intended to suspend a clinical trial of puberty blockers on the grounds that the research could prove harmful to the children taking part.

The study was commissioned in response to last year's Cass review of gender identity services which found that gender medicine was an area of remarkably weak evidence" and built on shaky foundations".