@Speedy85
No. Where the Codes specifically cover gender reassignment they cover gender reassignment solely under s7 Equality Act 2010. It makes no difference where the person covered by the codes has a GRC or not. Those sections of the Codes are not dealing with s11 characteristics, which are covered elsewhere. It's really important to know this because this is part of the determining factor in deciding if any act of discrimination is a s7 breach, or a s11 breach, or a breach of both.
It should also be noted that Education and Service Provision are covered by separate sections of the Act. As a result, if you read through Services, public functions and associations Statutory Code of Practice you will note that the Codes specifically mention that they don't cover a large swathe of the Equality Act as it relates to education. As a result, any conclusion drawn from guidance issued to schools won't apply to the guidance issued in the Services, public functions and associations Statutory Code of Practice where the Code offers guidance otherwise.
Section 13.9 (which is the section used in tertiary guidance stating that challenging somebody's use of facilities should be done with care). There's a classic mistake to make here. When following statutory codes issued by EHRC care must be given to what is written, and never to what is not written. At no point in the Code does it state that if 13.9 doesn't apply then a transsexual person should not be treated as as their acquired gender, and care should always be given to ensure that store policies reflect this. Requiring a person with a s7 characteristic to use a third option instead of the option matching their acquired gender would still amount to discrimination as discrimination occurs at the point when that person is barred from accessing the service of their acquired gender. Indeed, in this situation that person is still covered by sections 13.6, 13.57, and 13.58 of the Code.
i.e. "Where an exception permits discrimination in relation to one protected characteristic, service providers, persons exercising public functions and associations must ensure that they do not discriminate in relation to any of the other protected characteristics" and "If a service provider provides single- or separate sex services for women and men, or provides services differently to women and men, they should treat transsexual people according to the gender role in which they present", and that "The intention is to ensure that the transsexual person is treated in a way that best meets their needs". As I mentioned in my reply above, if a service provider is found to have acted lawfully in regards to a SCH3 Part 7 s28 Equality 2010 exemption they are not required to provide a third space, and if they have not acted lawfully in regards to the same, then forcing a person with s7 protection to use facilities that does not match their acquired gender amounts to unlawful discrimination under the Act.
Likewise, as mentioned previously in this thread, there is already case law in this regard to the provisioning of seperate-sex services in the context of of a high-street style environment. The case hinged on the fact that the claimant had been barred from accessing the facilities designated for use by women, and the judgement ruled in favour of the claimant.
And again, I'll point out that because of the OPs first post, I'm talking about the provisioning of separate- and single- sex services in a high street style environment and how this relates to the Equality Act 2010.