A significant legal challenge brought by the charity Sex Matters, aiming to restrict transgender individuals from using single-sex changing facilities at Hampstead Heath’s iconic swimming ponds, has been definitively dismissed by the High Court. The ruling by Mrs Justice Lieven concluded that the High Court was not the appropriate venue for this particular claim, directing that any further action should be pursued in the county court. This decision effectively halts Sex Matters’ attempt to judicially review the City of London Corporation’s policy, which permits transgender individuals to access facilities aligned with their affirmed gender.
Sex Matters had argued that the City of London Corporation’s policy, which governs the operation of the historic men’s, ladies’, and mixed bathing ponds on Hampstead Heath, constituted unlawful sex discrimination. Their legal team contended that allowing transgender people to use facilities designated for the gender with which they identify was contrary to the spirit and letter of the law, particularly in light of the Supreme Court’s April 2025 ruling that broadly defines a woman by biological sex under the 2010 Equality Act. Tom Cross KC, representing Sex Matters, argued during a December hearing that this policy places cisgender women at a "greater risk of suffering the detriment of her privacy, dignity or safety being compromised," thereby treating them "less favourably" than men. He asserted that the corporation should have amended its policy following the landmark Supreme Court judgment.

However, the City of London Corporation, represented by Daniel Stilitz KC, countered that the legal action was "unhelpful, premature and the wrong way for doing these things." Crucially, they argued that the claim was out of time, as the current trans-inclusive policy has been in place since 2017, predating the Supreme Court’s recent ruling. This procedural argument appears to have been a significant factor in the High Court’s decision to dismiss the challenge without a full hearing on the merits of the discrimination claim.
The backdrop to this legal battle is the deeply ingrained tradition and popularity of the Hampstead Heath bathing ponds, which date back to the 18th Century. These natural swimming pools, nestled within the sprawling green expanse of Hampstead Heath in North London, are a beloved amenity for Londoners and visitors alike, particularly during warmer months. The ponds, comprising the Kenwood Ladies’, Highgate Men’s, and the Hampstead mixed ponds, have long been a site of both recreation and social gathering. The question of access, especially concerning the use of single-sex facilities, has become a focal point in the broader societal debate surrounding transgender rights and inclusivity.
Adding a significant dimension to the corporation’s decision-making process, a comprehensive public consultation on the future of the bathing ponds’ access policies was conducted. The results of this consultation, published concurrently with the High Court ruling, revealed overwhelming public support for the existing trans-inclusive arrangements. Out of over 38,000 respondents, a substantial majority—nearly 90%—backed trans-inclusive access to the ponds. This broad consensus from the community underscores the prevailing sentiment among regular users of the bathing ponds.

The consultation, which ran for two months, engaged a diverse group of stakeholders. Notably, 84% of those who participated had themselves swum at the bathing ponds, and 74% resided in London, indicating a strong connection to the facilities. The survey explored six distinct options for the ponds, with the existing trans-inclusive access arrangements receiving the endorsement of 86% of respondents. Furthermore, a similar proportion actively opposed the introduction of strict single-sex access. The consultation also revealed strong opposition to more divisive measures: 90% rejected the idea of requiring trans swimmers to use separate changing rooms or have separate swimming sessions, and a notable 66% were against making all ponds mixed-sex. These figures present a clear mandate from the community for maintaining and upholding inclusive practices.
The City of London Corporation, as the custodian of these historic bathing ponds, has consistently advocated for policies that balance inclusivity with the preservation of the ponds’ unique character and the comfort of all users. Their defence in court highlighted their commitment to managing the facilities in accordance with legal requirements and community expectations. The recent consultation results provide robust evidence of public backing for their approach, reinforcing their position in managing these cherished public spaces.
The ruling by Mrs Justice Lieven signifies a victory for transgender rights advocates and for the City of London Corporation’s existing inclusive policies. It means that the status quo, allowing transgender individuals to use facilities corresponding to their gender identity, will continue at the Hampstead Heath bathing ponds without immediate legal impediment from this particular challenge. While the legal avenue pursued by Sex Matters has been closed, the broader debate on sex and gender in single-sex spaces is likely to continue. However, for now, the swimming ponds of Hampstead Heath remain a welcoming space for all, reflecting the inclusive ethos supported by the overwhelming majority of the community that cherishes them. The decision also implicitly points towards the preference for disputes of this nature to be handled through established administrative and potentially lower court processes, rather than immediate resort to the High Court for judicial review, particularly when procedural grounds for dismissal exist. The extensive consultation data further solidifies the corporation’s commitment to a community-informed approach to policy-making.







