Catching up with the thread but Im not so sure.
The judge took a very keen interest when DU started wanging on about "hormonal sex, chromosomal sex, psychological sex blah blah blah" It was a pong list. I watched that part live and he was scribbling furiously.
I didn't manage to get log ins for the delayed part ofnthe tribunal, but from following this thread the same thing happened when MC (I think) gave evidence.
I am inclined to think JR will argue via flapdoodle, that therefore DU is not male and male biological sex doesn't apply to him (because hormones or psychology or something), and biological sex wasnt defined int the FWS judgement (a lot.of TRAs are already saying this)
I am also inclined to think the Judge will wrongly agree to this. I get a sinking feeling - there was something about his manner.
I do not know why SPs team did not put up an expert witness to show how biological sex actually works because it is extremely relevant.