From the Forstater EAT, in reference to the ET:
The Tribunal held that the belief, being absolutist in nature and whereby the Claimant would “refer to a person by the sex she considers appropriate even if it violates their dignity and/or creates an intimidating, hostile, degrading or offensive environment”, was one that was “not worthy of respect in a democratic society”. Accordingly, the Tribunal concluded that the belief did not satisfy the fifth criterion in Grainger plc v Nicholson [2010] ICR 360 (“Grainger V”).
EAT verdict:
Held, allowing the appeal, that the Tribunal had erred in its application of Grainger V. A philosophical belief would only be excluded for failing to satisfy Grainger V if it was the kind of belief the expression of which would be akin to Nazism or totalitarianism and thereby liable to be excluded from the protection of rights under Articles 9 and 10 of the European Convention of Human Rights (ECHR) by virtue of Article 17 thereof. The Claimant’s gender-critical beliefs, which were widely shared, and which did not seek to destroy the rights of trans persons, clearly did not fall into that category. The Claimant’s belief, whilst offensive to some, and UKEAT/0105/20/JOJ notwithstanding its potential to result in the harassment of trans persons in some circumstances, fell within the protection under Article 9(1), ECHR and therefore within s.10, EqA
https://assets.publishing.service.gov.uk/media/60c1cce1d3bf7f4bd9814e39/Maya_Forstater_v_CGD_Europe_and_others_UKEAT0105_20_JOJ.pdf