Then we get the ‘of course the belief is protected but the manifestation of the belief isn’t, therefore you can’t manifest it at all!’ crew.
No. The judgments to date (rightly) mean the protection of the belief does not automatically protect the manifestation of the belief, so whether or not your actions were protected needs to be decided on the basis of whether the actions undermined the rights of others, and to what extent.
So it might be that if Mackereth had said, at work, to a patient, ‘Please be aware that I am gender critical’ but had avoided using preferred pronouns (ie using a name instead), the outcome would have been different.
It is not the case that manifestation of GC belief at work is a sacking offence.