There’s a comment on Audrey Ludwig’s “Blog about Boxes” that seems to me to need a short post of its own. The full comment is
Can I ask a question about something I’ve seen claimed many times (including by senior politicians) – “the law states that transwomen are women.” Does the law actually say this?
The short answer is no: the law doesn’t define the terms “transwoman” or “trans woman” at all.
The Gender Recognition Act 2004 does change some people’s legal sex. Obviously the law can’t change anyone’s biological sex. The fact that the law can’t mess with material reality is the point Canute was making when he forbade the tide to come in. But section 9 of the Gender Recognition Act 2004 has the effect that some trans women (i.e. the very small number who hold a GRC – only a few thousand to date) are deemed for most legal purposes to be women, although exceptions apply.
The Equality Act 2010 forbids discrimination (in various different contexts) on grounds of gender reassignment. That means that in those contexts where the Act has effect (employment, provision of public services, education etc.), it’s mostly unlawful to treat a person less favourably than you’d treat other people because they are proposing to undergo, are undergoing or have undergone “a process (or part of a process) for the purpose of reassigning the person’s sex by changing physiological or other attributes of sex.” If a person is somewhere on that path, it doesn’t matter whether they’ve got a GRC or not: they’re entitled anyway not to suffer discrimination on grounds of gender reassignment. There are some necessary exceptions, but in general it’s obviously right that there should be a legal prohibition against discrimination on this ground.
But it’s important to note that that doesn’t mean that trans women are entitled to be treated for all purposes as if they were biological women. If a trans woman who doesn’t have a GRC wants to access a female-only space, and is refused access, that’s not discrimination on grounds of gender reassignment, but discrimination on grounds of sex. She’s refused access not because she’s trans, but because she’s both legally and biologically male. That means she can lawfully be refused access any time it’s lawful at all to have a female-only space. In my view, it also means she almost certainly should be refused access in those circumstances. That’s because it’s only lawful at all to provide a single-sex space or service if there’s a good reason for sex segregation; but if trans women are admitted, it will cease to be a single-sex space.
If a trans woman who does have a GRC wants to access a female-only space or service, it’s still likely to be lawful to refuse, because of the exceptions that apply to prohibitions on discrimination on grounds of gender reassignment.
In short, the Equality Act does recognise that although sex is usually a bad and arbitrary reason for treating people differently, there are contexts in which biological sex matters.