I see no big hitter has yet come out to clarify and defend the manifesto "compromise" and to enforce party discipline.
My reading of the manifesto is that they have been fairly clear about what they intend to do, but there are some parts which need more clarification.
They say they're going to ' Ensure that the single-sex based exemptions in the Equality Act 2010 are understood and fully enforced in service provision.' This means that they're going to stop the current trend for mixed sex/gender neutral toilets, and keep places like hospital wards and prisons single sex. This is what the 'single-sex' exemption in the EA2010 is for - the provision of services for one sex only or different services for the two sexes.
This is where the law is a bit of a mess. In theory, simply having the protected characteristic of gender reassignment should only protect someone from discrimination on that basis, but shouldn't allow someone to self-identify their way into spaces for the opposite sex, so a transwoman without a GRC is legally male and should be excluded from women's spaces on the grounds of sex. But they are currently able to self-identify into women's spaces and services. Are Labour saying that they will stop this? They need to be clear.
They also say they're going to bring in self-ID for obtaining a GRC. That means anyone who wants to can change their legal sex, and get a new birth certificate with their new acquired sex on it, with no gatekeeping.
There is a further gender reassignment exemption in the EA which can keep transwomen, even those with a GRC out of women's spaces if it is a 'proportionate means of achieving a legitimate aim'. It is currently uncertain if this is ever actually enforced in practice for GRC holders, or even if it could be. And that uncertainty, along with GRCs being obtained by self-ID, means that it might be impossible to stop any man from being able to self-declare himself a woman and enter women's spaces. So it is unclear what Labour intend to do about this situation, or even if they consider it to be a problem.
My feeling is that Labour think TWAW (all women shortlists open to self-identifying women), so I think they are saying that they'll stop transwomen without GRCs from using women's spaces (which will be retained), while at the same time allowing anyone to get a GRC on demand, with transwomen with GRCs to have exactly the same rights as women.
This fits what they say in the manifesto, as well as Dawn Butler's comments.