Harman, who now chairs a women's rights group, was involved in drafting the Equality Act, and she says today's ruling gives "effect to our intention when drafting it".
https://www.bbc.com/news/live/cvgq9ejql39t?page=3
Harman's interpretation was just after the judgment had been handed down when, with her background, she'd have assumed that companies and organisations would follow the law.
She'll now have seen that many of them don't want to do this, including those that in some way lean towards the Labour party, such as the NHS, the education system, the trade unions, certain parts of the media, the arts, etc.
I wouldn't be surprised to see that if the wind changed and seemed to favour the genderists, her recollection would change too.