Single-sex spaces and women's sport in the UK

How do UK law and British sporting bodies handle single-sex provision and male inclusion in female sport?

The UK has never had a single, uniform rule requiring every sporting body to organise competition by sex in exactly the same way. Instead, Parliament created a legal framework in the Equality Act 2010, while national governing bodies decide how that framework applies to the physical demands, contact risks, competitive level and practical structure of their own sports.

Background

The UK has never had a single, uniform rule requiring every sporting body to organise competition by sex in exactly the same way. Instead, Parliament created a legal framework in the Equality Act 2010, while national governing bodies decide how that framework applies to the physical demands, contact risks, competitive level and practical structure of their own sports.

The starting point is that sex is a protected characteristic and that people undergoing, proposing to undergo or having undergone gender reassignment are separately protected against discrimination. This distinction matters. The law does not say that trans people are outside sport, nor does it abolish women’s sporting categories. It provides specific exceptions so that organisers can preserve fair competition and safety where sex-linked physical differences are material.

For women and girls, separate sporting provision is not merely an administrative convention. Female categories were created because male puberty produces average physical advantages relevant to many competitive activities. The legal question is therefore not whether every individual male is stronger or faster than every individual female. It is whether the activity is one in which the physical strength, stamina or physique of average people of one sex would disadvantage average people of the other sex.

The 2025 Supreme Court judgment in For Women Scotland Ltd v Scottish Ministers has made the statutory position clearer across Great Britain. The case did not begin as a sports dispute: it concerned Scottish public-board guidance. But its interpretation of the Equality Act is directly relevant to any sporting body deciding what its female category means.

What the documents say

Equality Act 2010

Section 195 defines a “gender-affected activity” as a competitive sport, game or activity in which the physical strength, stamina or physique of average persons of one sex would put them at a disadvantage compared with average persons of the other sex. In such an activity, organisers may make different arrangements for male and female competitors without contravening the Act’s sex-discrimination provisions (Equality Act 2010, section 195).

Section 195 also addresses gender reassignment. It says that restricting a transsexual person’s participation is not unlawful under the relevant services, education and associations provisions where the restriction is necessary to secure fair competition or competitor safety. The statutory test is necessity, not preference, and its application must be grounded in the sport concerned. For children, the Act specifically says that age and stage of development should be considered.

Separate and single-sex facilities are governed principally by different provisions: Schedule 3 of the Act. It permits separate or single-sex services where they are a proportionate means of achieving a legitimate aim, and permits limits or modifications to access for reasons connected with gender reassignment where proportionate. Changing rooms, showers and toilets may therefore raise privacy, dignity and safeguarding questions distinct from eligibility to enter a race, play a match or win a title.

The courts

In For Women Scotland Ltd v Scottish Ministers [2025] UKSC 16, decided on 16 April 2025, the Supreme Court unanimously held that the terms “sex”, “man” and “woman” in the Equality Act 2010 refer to biological sex. It rejected the proposition that a full Gender Recognition Certificate changes a person’s sex for the purposes of the Act. The Court also held that this interpretation does not remove protection from trans people, who remain protected under the distinct characteristic of gender reassignment (Supreme Court, 2025).

The litigation had travelled through the Scottish courts: the Outer House dismissed the challenge on 13 December 2022, and the Inner House dismissed the appeal on 1 November 2023. The Supreme Court reversed that outcome. Although the case was not a challenge to a sports policy, it is now the leading UK authority on the meaning of sex in the Equality Act. It does not itself prescribe a single competition policy for every sport.

Sporting and government guidance

The Sports Councils’ Equality Group guidance of September 2021 advised governing bodies that transgender inclusion, competitive fairness and safety cannot always be balanced in gender-affected sport where competition is meaningful. It recommended sport-by-sport policies informed by peer-reviewed evidence, the level of competition and the availability of open or mixed provision (Sports Councils’ Equality Group, 2021).

The Government stated in February 2024 that, in competitive sport and particularly women’s sport, fairness and safety must be primary considerations and cannot be reconciled with self-identification in the female category in gender-affected sport alone (Department for Culture, Media and Sport, 2024).

The Department for Education’s consultation outcome of 12 February 2026 proposed putting guidance on gender-questioning children into Keeping Children Safe in Education. Its proposed approach says that where sport must be sex-separated from a particular age to ensure safety, no exceptions should be made; where this is not necessary, schools should consider individual requests while taking fairness into account (Department for Education, 2026).

The Cass Review, commissioned by NHS England and published on 10 April 2024, was a review of children and young people’s gender-identity health services, not a sports-policy report. It made no sporting eligibility rules. Its relevance is narrower but important: it urged greater clinical caution, stronger evidence and attention to safeguarding when adults make decisions affecting gender-questioning children (Cass Review, 2024).

The positions

The sex-based position is that female sport must remain a protected category for natal females, because the category exists to offset male physical advantage and to create meaningful routes to selection, medals, records, scholarships and team places. On this view, self-identification is incompatible with a sex category, and testosterone thresholds or individual assessments cannot reliably remove every performance or safety advantage associated with male puberty. Open, mixed and additional participation routes should be developed so that nobody is excluded from sport altogether.

The trans-inclusion position stresses the social and health value of sport, the risk of stigma and exclusion, and the diversity of bodies, transitions and sporting contexts. It argues that blanket exclusions can be disproportionate, especially in non-contact or recreational settings, and that policies should distinguish elite competition from community participation. Advocates of this position commonly support case-by-case assessment, hormone-related criteria, or rules tailored to the specific sport.

British governing bodies have increasingly adopted sex-based female categories alongside open or mixed alternatives. UK Athletics proposed an open category and a women’s category for athletes recorded female at birth in 2023. British Triathlon introduced female and open categories. The FA and England Netball changed their rules in 2025. These are policy choices by individual bodies, not evidence that Parliament has imposed one identical model on all sport.

Interpretation

Beyond Gender’s reading is that the UK legal record supports clear sex-based female sporting categories. Section 195 was drafted precisely because formal equality cannot deliver fair competition where sex-linked physical differences are relevant. The Supreme Court’s 2025 clarification removes a major source of ambiguity: under the Equality Act, the female sex category refers to biological females, including where the category is used to protect women’s sport.

This does not justify hostility towards trans people or their exclusion from physical activity. It does mean that inclusion should not be achieved by redefining the female category out of existence. A humane and workable settlement is to protect female competition honestly, provide open or mixed routes wherever feasible, and make facilities decisions with privacy, dignity and safeguarding in mind.

Parents, clinicians and journalists should also resist attempts to treat the Cass Review as a sporting rulebook. Cass is relevant to caution around children and safeguarding, but the direct legal authorities for sport are the Equality Act, the Supreme Court judgment and each governing body’s published eligibility policy.

Open questions

The principal practical question is how consistently governing bodies will apply section 195 after the Supreme Court judgment. Some sports have adopted female-plus-open models; others retain policies based on different criteria or are reviewing them. There remains scope for disagreement about which activities are gender-affected, at what age sex separation becomes necessary, and what evidence establishes a safety risk.

There are also unresolved questions about grassroots provision. Small clubs may lack the numbers, facilities or funding to create separate open categories. Yet scarcity of provision cannot be a reason to remove an existing female category. Public bodies and funders should examine how open, mixed and social participation can be expanded without shifting the cost of inclusion onto women and girls.

Finally, UK readers should note territorial limits. The Equality Act 2010 applies in Great Britain; Northern Ireland has a separate equality-law framework. Policies in Scotland, Wales and England may also differ because sport is organised through different governing bodies and devolved institutions.

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