So all three ponds will go mixed sex, then?
If they continue to ladies = women & TW, they break the law on direct discrimination.
If they say "oh, it's separated by gender, not sex, it's likely to be challenged on trade descriptions and indirect discrimination as no one has an objective description of what gender is.
If go for mixed sex, there will be an outcry on all sides, especially for the men.
They are screwed. They know it. They want to continue to fudge it.