FYI – Supreme Court of the United Kingdom For Women Scotland Ltd v The Scottish Ministers [2025] UKSC 16 (judgment delivered 16 April 2025)
Supreme Court of the United Kingdom
For Women Scotland Ltd v The Scottish Ministers
[2025] UKSC 16 (judgment delivered 16 April 2025)
1. Why the case mattered
This appeal was about a single but important question: when Parliament said “woman” and “sex” in the Equality Act 2010 (EA 2010), did it mean biological sex only, or did it also mean the acquired sex of someone who holds a Gender Recognition Certificate (GRC) under the Gender Recognition Act 2004 (GRA 2004)? The answer affects how public bodies count women, how single-sex services are run, and how both women and trans people rely on discrimination law.
2. Background in brief
- The 2018 Act – The Scottish Parliament passed the Gender Representation on Public Boards (Scotland) Act 2018. It set a target that 50 % of non-executive board seats should be held by “women”.
- Expanded definition – Section 2 of that Act said “woman” included some trans women who were living as women but did not require a GRC.
- First challenge – For Women Scotland (FWS), a feminist charity, persuaded the Inner House of the Court of Session that this definition strayed into equality law, a matter reserved to Westminster. The Scottish Ministers rewrote their statutory guidance instead of changing the Act.
- Revised guidance – The new guidance counted any trans woman with a GRC as a woman for the 50 % target.
- Second challenge – FWS again sought judicial review, arguing that even the GRC-based approach was wrong. They lost in the Court of Session (Lady Haldane in the Outer House and then the Second Division) but were given permission to appeal to the Supreme Court.
3. The issue for the Supreme Court
The Justices (Lords Reed, Hodge DP, Lloyd-Jones, and Ladies Rose & Simler) confined themselves to statutory interpretation. They asked:
- Does section 9(1) GRA 2004 (“a person’s gender becomes for all purposes the acquired gender”) automatically flow into the EA 2010?
- Or does section 9(3) GRA 2004 (“subject to provision made by any enactment…”) allow later Acts such as the EA 2010 to disapply that rule where it would not work?
4. Arguments of the appellant – For Women Scotland
- Biological reading of sex – Parliament always used “woman”, “man” and “sex” biologically in earlier discrimination statutes. Neither the 1999 gender-reassignment regulations nor the GRA 2004 rewrote those words.
- Section 9(3) switch-off – If importing certificated sex into the EA 2010 would make parts of that Act incoherent, the EA 2010 must be read as “provision” disapplying section 9(1).
- Incoherence examples – Pregnancy provisions, women-only sports, communal accommodation, and data duties all fail if biological males with GRCs are treated as female. Single-sex exceptions would become unworkable.
- Trans protection remains – Trans people keep the separate protected characteristic of gender reassignment, so a biological reading does not deprive them of legal safeguards.
5. Arguments of the respondent – The Scottish Ministers
- All-purposes rule – Section 9(1) GRA 2004 is broad and clear: once a GRC issues, the person’s sex is changed “for all purposes”, including the EA 2010, unless later legislation expressly says otherwise. The EA 2010 says nothing express, so the section 9(1) rule prevails.
- Variable meaning – The words “woman” and “sex” can bear a biological sense in pregnancy provisions but a certificated sense elsewhere; that limited inconsistency is workable.
- No practical harm – Guidance simply ensures that some qualified trans women help fulfil the 50 % gender-balance target, advancing equality and representation.
6. The interveners
- Sex Matters backed FWS, stressing that trans women already obtain full protection through gender-reassignment rules and that mixing definitions breeds absurdity.
- EHRC supported the Ministers’ legal view but admitted the resulting law “has not been straightforward”, listing eight areas where a biological definition would be clearer.
- Lesbian groups argued that allowing GRC holders into the female category threatens the freedom of lesbians to meet as a same-sex group.
- Amnesty International UK favoured the Ministerial approach on human-rights grounds.
7. How the Court approached the statutes
The Court traced the legislative story:
- Sex Discrimination Act 1975 – words were plainly biological.
- 1999 Regulations – created a separate protected ground of gender reassignment but did not alter “man” or “woman”.
- GRA 2004 – devised a deeming rule about sex, yet made it “subject to any other enactment”. It did not itself change discrimination law wording.
Applying orthodox canons of construction – read words consistently, avoid absurdity, and ensure people can understand the law – the Court held that later legislation can cut down a deeming rule without using explicit words if the two are fundamentally incompatible.
8. Why certificated sex could not fit the EA 2010
The judges gave detailed illustrations:
- Pregnancy & maternity (ss 17-18) – Only biological females can be pregnant, so the comparator concept collapses if some legal “men” (pregnant trans men) are excluded.
- Separate and single-sex services (Sch 3 paras 26-28) – Rules about privacy, dignity and proportionate exclusion presuppose two mutually exclusive biological categories.
- Gender-affected sports (s 195) – Safety and fairness tests rely on average physical differences between the sexes; those tests become unusable if the “female” pool includes biological males with GRCs.
- Public-sector equality duty (s 149) and data – When counting women’s disadvantage, mixing in some biological males and excluding some biological females destroys statistical clarity.
In each setting, a “certificated sex” meaning produced either absurdity or extra hurdles, while a biological meaning worked neatly. That pattern was enough to trigger section 9(3) and disapply section 9(1) for the EA 2010.
9. The Court’s summary of reasoning
In paragraph 265 the Court set out eighteen bullet points; the essence is:
- Parliament never altered the biological sense of “woman/man” when it consolidated the legislation in 2010.
- Reading sex as certificated sex would cut across those definitions and create heterogeneous groups.
- A single, clear, biological meaning throughout the EA 2010 is necessary for the Act to be coherent and predictable.
10. Result and formal orders
- Appeal allowed – The Supreme Court quashed the Scottish Government guidance so far as it counted GRC-holding trans women as women for board-quota purposes.
- Competence confirmed – Once “woman” is read biologically, the 2018 Act stays within the devolved exception for positive action measures and is valid.
- Broader impact – The judgment does not bar public boards from appointing trans people, but they cannot tick them towards the statutory target for women.
11. What happens to trans protections?
The Court emphasised that trans men and trans women – with or without GRCs – still enjoy the full suite of rights against discrimination, harassment and victimisation on the ground of gender reassignment. Treating sex biologically simply recognises that Parliament chose to protect sex and gender reassignment as distinct characteristics, each needing clear boundaries.
12. Implications for everyday life
- Single-sex services – Organisations can rely on the EA 2010’s single-sex safeguards by using biological sex, reducing legal uncertainty for providers of refuges, hospital wards, changing rooms and sports.
- Data and policy – Governments and employers can gather statistics or take positive action for women without double-counting or omitting anyone because of paperwork.
- Further reform – The Court noted that some difficulties identified by the EHRC may merit Parliament’s attention, but it is for legislators, not judges, to re-draw categories if they wish.
13. A plain-language conclusion
The Supreme Court has decided that, in British equality law, “woman” still means an adult human female and “man” still means an adult human male, even if a person has changed their legal paperwork under the Gender Recognition Act. That rule keeps the Equality Act stable and understandable. It does not strip trans people of protection – they remain safeguarded under the separate ground of gender reassignment.
For public boards in Scotland, the decision means the 50 % target really is about biological women; if Ministers wish to ensure trans representation as well, they can adopt a separate measure. More broadly, service-providers, sports bodies, schools and employers now have firmer guidance on when and how they may provide women-only spaces or schemes.
The Court’s judgment leaves space for Parliament to change the law if social policy evolves. Until then, the two protected characteristics – sex and gender reassignment – sit side by side, each clearly defined, so that everyone – women, men and trans people alike – can understand their rights and obligations.
The information provided herein summarises existing content and is intended solely for informational purposes. For comprehensive details, please consult the original sources.
The judgement can be found HERE
