Transgender women can use single sex changing rooms as they have the protected characteristic of gender reassignment under the equality act.
Yes, tw can use single sex changing rooms and must not be discriminated against because of their PC of gender reassignment. Tw have the same right to use male changing rooms as any other male. If that's not happening you should complain because that's discrimination.
SpartacusAutisticus said it best:
This ridiculous notion that having rights accorded to one protected characteristic affords rights granted to another needs to stop. Having the PC of gender reassignment gives protections to those who meet the criteria for that PC, it doesn't give rights accorded under the PC of sex, any more than it gives rights under the PCs of maternity, age or disability.
To exclude them you'd need to prove you had a legitimate reason and it was proportional (proportional means of achieving a legitimate aim).
Preventing harassment is always a legitimate aim because harassment is prohibited conduct under the equality act.
Harassment is unwanted conduct (in this case CP's mixed sex changing rooms policy) related to a protected characteristic (in this case sex) which has the purpose or effect of violating our dignity or creating an intimidating, hostile, degrading, humiliating or offensive environment for us (see many women's posts on this thread for examples).
www.legislation.gov.uk/ukpga/2010/15/section/26
Excluding a tw from an open plan female changing room is always a proportionate means because allowing one single tw access to that space makes it mixed sex for everyone.
It's especially proportionate when you've been offered a suitable alternative to changing with men. Did you explain what was wrong with the initial offer of private changing facilities? Maybe I missed that post.
That's decided by a court case and applied on a case by case basis.
'Case by case' is not in the EA anywhere. EHRC put it in their statutory code following pressure from TRA orgs in 2011.
www.equalityhumanrights.com/en/publication-download/equality-act-codes-practice-post-consultation-report
www.equalityhumanrights.com/en/publication-download/services-public-functions-and-associations-statutory-code-practice
EHRC statutory code is not compatible with the EA because 'case by case' makes the single sex exceptions impossible to use.
One of the recommendations from the recent inquiry into enforcing the equality act and the role of the EHRC was that EHRC should write new statutory code to bring greater clarity around the use of single sex exceptions. EHRC refused because they said there is no case law. This is shocking because a huge part of their role is to bring case law.
publications.parliament.uk/pa/cm201919/cmselect/cmwomeq/96/9604.htm
We will bring them case law.