Important note.
Scottish Labour have openly broken with Westminster on this see their manifesto which commits to supporting biological sex multiple times in forthright language. Sarwar said in the press conference launch that he was supporting the result of the Supreme Court verdict. Thread here:
https://www.mumsnet.com/talk/womens_rights/5516606-scottish-labour-manifesto-commits-to-single-sex-spaces
This makes Phillipson look ridiculous. Also bear in mind the Home Secretary is very firmly in the women exist camp. The biology is real group is too powerful for the TAs to get much of what they want.
I think Phillipson is trying to hedge and find a non existent middle way because Labour has a lot of TA fanatics who can't admit they were wrong. It is the same thing facing Wes Streeting who just published in Pink News saying how much he loved trans kids and got loads more hate.
A chunk of Labour want to be nice. That ship has sailed.
I suspect Philipson is waiting till after the May elections to drop the news. I think it might be some kind of absurd mishmash which will say biology is real, but also use mixed up language or something.