Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, how many detransitioners from the Early Intervention Study run by the Tavistock Gender Identity Development Service (GIDS) in 2011-14 have presented to the NHS for either medical injury or regret; and how many detransitioners, in total, have presented to the NHS for either medical injury or regret since the Cass review was commissioned.

Data and research on detransition has been limited and the number of individuals who may wish to seek help from the National Health Service is not held.

In line with recommendation 25 of the Cass Review, NHS England is developing a clinical pathway for individuals who wish to detransition. Between October and December 2025, NHS England held a 'call for evidence' aimed at healthcare professionals and medical bodies, and the responses will help to shape the development of a care pathway and service specification which NHS England plans to consult on in the summer of 2026.