Someone upthread mentioned that the question of whether gi/twaw beliefs meet the grainger criteria was raised in the rape crisis case. I noticed that too following tribunal tweets. It was one of the angles that the barrister used. It didn't seem to be a main angle but it was there, and I wonder if the judgment will address the question.
I think the point was that while two sets of beliefs were in play - those of employer and the employee suing - they weren't booth equal because the employer's beliefs do not attract any protection from the law. Only the employee's do. So she could not have been expected to fall in with their values/beliefs of the organisation.
Ianal but I expect gi/twaw beliefs would be protected. They would surely be woriads because the bar for that is set low. They are important, about a weighty part of life etc. If they fail I think its more likely to be based on the coherence because there is so much internal contradiction - a fact that is covered over by slogans and generalisations.