“…At the heart of Hilary Cass’s review of gender identity services in the NHS is a concern for the welfare of “children and young people” (doi:10.1136/bmj.q820). 1 Her stated ambition is to ensure that those experiencing gender dysphoria receive a high standard of care. This will be disputed, of course, by people and lobbying groups angered by her recommendations, but it is a theme running through the review.…”