Law Restored to Language: Standing, Statute, and the Limits of Activist Litigation
In the Administrative Court of the King’s Bench Division, before Mr Justice Swift, judgment was handed down in R (Good Law Project Ltd and others) v Equality and Human Rights Commission [2026] EWHC 279 (Admin), a case ostensibly concerning workplace guidance on single-sex facilities, but in substance addressing a more fundamental question: whether the meaning of statute may be unsettled by persistent litigation once authoritatively determined.¹ The Court’s answer was decisive. It upheld the lawfulness of guidance issued by the Equality and Human Rights Commission (EHRC), confirming that it accurately reflected the Supreme Court’s ruling in For Women Scotland Ltd v Scottish Ministers that, for the purposes of the Equality Act 2010, “sex” denotes biological sex.²
This was not merely the failure of a claim. It was the reassertion of legal finality.
Facts, Parties, and Procedural Posture
The claim was brought by the Good Law Project together with several anonymised individuals, challenging the EHRC’s interim update on the practical implications of the Supreme Court’s 2025 decision. The guidance addressed the provision of single-sex facilities in workplaces and services, stating that such provision must be organised by reference to biological sex while remaining subject to the proportionality requirements embedded within the Act.
This interim update did not arise in a vacuum. It was issued in the immediate aftermath of the Supreme Court’s clarification, at a moment when employers, service providers, and public authorities faced acute uncertainty as to their legal obligations. The EHRC, as the statutory regulator charged with enforcing equality law, was required to respond promptly. Its intervention was therefore both reactive and necessary: a translation of judicial determination into operational guidance for institutions tasked with compliance.
Permission to apply for judicial review was granted to the individual claimants but refused to the institutional claimant. The Court held that the Good Law Project did not meet the “sufficient interest” threshold required under section 31(3) of the Senior Courts Act 1981, lacking any direct or representative connection to those affected by the guidance.³ This is the classic boundary of public law standing: the exclusion of the mere intermeddler—what the authorities have long described as the *“busybody.”*⁴
On the merits, the claims failed entirely. The Court did not find partial error, nor technical defect, nor procedural irregularity. It found the guidance lawful in substance and in form.
The Authority of the Supreme Court and the Meaning of “Sex”
The legal foundation of the case lies in the Supreme Court’s judgment in For Women Scotland, which held that:
“the terms ‘man’ and ‘woman’ in the Equality Act 2010 refer to biological sex.”⁵
The Court emphasised that statutory coherence depends upon this definition:
“the provisions relating to sex discrimination can only be interpreted coherently if ‘sex’ is given a biological meaning.”⁶
These statements do not merely clarify ambiguity; they resolve it. They establish a fixed point within the statutory scheme, anchoring all subsequent interpretation. Without such an anchor, the Act’s provisions—particularly those concerning single-sex services, occupational requirements, and protections against discrimination—would fragment into inconsistency.
The EHRC’s task was not to reinterpret these findings, nor to mediate between competing philosophical accounts of sex and gender, but to give practical effect to the law as declared. Mr Justice Swift confirmed that it had done precisely that:
“The Commission’s interim update accurately reflected the effect of the Supreme Court’s judgment and did not misstate the law.”⁷
This affirmation carries weight beyond the immediate case. It signals that the chain of legal authority—from Parliament to Supreme Court to regulator—remains intact. The EHRC did not innovate. It complied.
Judicial Review and the Discipline of Legality
The claimants’ argument rested on the contention that the guidance failed to balance competing rights and thereby undermined the EHRC’s statutory duties. Yet this formulation subtly recasts the function of judicial review. It invites the Court to step beyond legality into the realm of policy arbitration.
The Court refused.
Judicial review, as developed within the common law tradition, is concerned not with the desirability of decisions but with their lawfulness. It asks whether a public body has acted within its powers, followed proper procedure, and reached a decision that is rational in the legal sense. It does not ask whether the outcome satisfies all competing interests, nor whether it aligns with evolving social norms.
As Swift J observed:
“There was nothing unlawful in the Commission focusing its interim update on the implications of the Supreme Court’s judgment for single-sex provision.”⁸
This observation is deceptively simple. It affirms that clarity is not unlawfulness, that precision is not exclusion, and that the articulation of legal consequences need not be diluted to accommodate every potential objection. To require otherwise would be to transform guidance into equivocation and law into suggestion.
Standing and the Limits of Strategic Litigation
The refusal of standing to the Good Law Project is of wider significance. Section 31(3) of the Senior Courts Act 1981 requires that a claimant demonstrate a “sufficient interest” in the matter to which the application relates. This threshold is not merely procedural; it is constitutional in character.
Its purpose is twofold. First, it ensures that the courts adjudicate concrete disputes rather than abstract disagreements. Second, it protects the judicial process from being instrumentalised as a forum for political campaigning.
Public interest litigation occupies a recognised space within this framework. Courts have, in appropriate circumstances, permitted claims brought by organisations acting in a representative capacity or addressing systemic illegality. But this latitude is not unlimited. Where an organisation lacks both direct impact and a clearly defined representational role, its claim risks becoming precisely what the doctrine guards against: the intervention of the “busybody.”⁹
In applying this principle, the Court did not diminish the importance of public debate. It reaffirmed that such debate must occur within its proper forum. The courtroom is not a substitute for the legislature, nor a stage upon which settled questions may be rehearsed indefinitely.
Single-Sex Spaces and the Internal Logic of the Act
The controversy surrounding single-sex facilities is frequently framed in absolutist terms, as though the law were confronted with irreconcilable demands. Yet the structure of the Equality Act reveals a more nuanced reality. The Act provides for sex-based protections while also permitting, in defined circumstances, differential treatment. Schedule 3 expressly allows for the provision of single-sex services where justified by considerations such as privacy, safety, or dignity.¹⁰
These provisions are not peripheral. They are integral. They reflect Parliament’s recognition that equality does not require uniformity in all contexts. Rather, it requires a principled framework within which differences may be accommodated without discrimination.
Such a framework depends upon definitional clarity. If “sex” is rendered indeterminate, the statutory scheme loses coherence. The categories upon which the Act relies cease to function, and the protections it affords become unstable. The Supreme Court’s ruling—and the EHRC’s guidance—restore that coherence by reaffirming the definitional foundation upon which the Act is constructed.
Against the Perpetual Reopening of Settled Questions
The broader significance of the case lies in what it resists. There is, in contemporary legal culture, a growing tendency to treat judicial decisions not as determinations but as provisional positions—open to revision through persistence, reframing, and repeated challenge. This tendency reflects a deeper shift: from law as a system of settled meanings to law as an arena of continuous negotiation.
The danger of such a shift is not merely theoretical. If every definition is subject to perpetual contestation, the law loses its capacity to guide conduct. Compliance becomes uncertain, enforcement inconsistent, and adjudication unpredictable. The rule of law depends upon more than the existence of rules; it depends upon their stability.
This judgment stands against that instability. It affirms that there is a point at which interpretation ends and application begins.
Conclusion: Finality and the Rule of Law
There is a point at which legal argument must give way to legal settlement. The Supreme Court defines the meaning of statute. The High Court ensures its application. Administrative bodies implement it. To return again and again to the same question is not to refine the law, but to resist it.
This judgment marks that point.
For a legal system cannot endure if every definition is provisional, every ruling revisitable, and every statute subject to reinterpretation by persistence alone. Law requires not only interpretation, but finality. It requires that words, once authoritatively defined, remain defined.
And where meaning is settled, it is not activism but obedience that preserves the rule of law.
- Equality Act 2010, Sch. 3, paras. 26–28.
- R (Good Law Project Ltd and others) v Equality and Human Rights Commission [2026] EWHC 279 (Admin), judgment of Swift J, 13 February 2026.
- For Women Scotland Ltd v Scottish Ministers [2025] UKSC 16.
- Senior Courts Act 1981, s.31(3).
- Inland Revenue Commissioners v National Federation of Self-Employed and Small Businesses Ltd [1982] AC 617 at 644 (Lord Diplock).
- For Women Scotland Ltd v Scottish Ministers [2025] UKSC 16 at [para. XX].
- Ibid.
- Good Law Project [2026] EWHC 279 (Admin) at [para. XX].
- Ibid.
- IRC v National Federation of Self-Employed [1982] AC 617.
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