Polly Carmichael became the director of the Gender Identity Development Service at the Tavistock in 2009. “I remember our office was literally a room that had probably been a broom cupboard at one stage”, she recalls. But the decision in 2011 to start offering puberty blockers to under-16s, and in 2016 to widen the professionals who could refer a child to GIDS had a major impact. The numbers of people on the waiting list ticked inexorably up, until the clinic felt it could barely cope. Listen to the full series today. For the premium Tortoise listening experience, curated by our journalists, download the free Tortoise audio app. For early and ad-free access to all our investigative series and daily and weekly shows, subscribe to Tortoise+ on Apple Podcasts.If you’d like to further support slow journalism and help us build a different kind of newsroom, do consider donating to Tortoise at tortoisemedia.com/support-us. Your contributions allow us to investigate, campaign and explore, and to build a newsroom that is responsible and sustainable. Hosted on Acast. See acast.com/privacy for more information.