The UK’s Supreme Court has ruled that “man”, “woman” and “sex” in the Equality Act 2010 refer to sex, not self-ID or paperwork (gender-recognition certificates). This agreed with our legal interpretation. We have published new guidance and are in the process of updating our publications to reflect the judgment. We are also working to provide answers to the questions we're hearing from supporters and the media. We will publish these as soon as possible.

The transition from sex to gender in English prisons: human rights and queer theory

By Michael Biggs. This paper analyses how the prison system in England and Wales transitioned from sex to gender, from the 1990s to the 2010s. It traces the succession of criteria for allocating males to women’s prisons: first genital surgery, then legal sex, and finally gender identity, and explains the two distinct forces behind these changes.