Amazing how few people have grasped the implications of Maya Forstater's epic win, even though it's several years ago now. I am not a lawyer but I think rhis is what happened. Maya was a consultant employed in the UK at a US-owned think tank on a fixed-term contract which she was expecting to be extended/renewed. That didn't happen and she was explicitly told it was because of her gender critical views, which she had expressed on social media. She went to an employment tribunal and initially lost, which must have been awful, but in the long run was the best result the rest of us could have hoped for, because she was then able to appeal. She won the appeal and because that came from a higher authority than an employment tribunal it's binding across the whole of the UK. Believing in the reality of biological sex and the existence of only two sexes, female and male, is a belief worthy of respect in a democratic society (WORIAD). That's official and anybody holding it is protected under the Equality Act. The EA lists nine protected characteristics: pregnancy, marriage, sexual orientation, sex, gender reassignment, age, disability, ethnicity, religious or philosophical belief. Belief in basic science falls under that last one.
When I first heard that Maya's legal team was relying on that argument, I thought it was nuts, but as stated above, I am not a lawyer, and they were right, I was wrong. They did us all a massive favour.
I wonder if Stroud Brewery even asked a lawyer before making this extremely unwise statement.