@aweegc said "I suspect he supports Sunak's government making the biological definition of sex, because he can then refer to that. I'll bet he wants it done asap so it's over before the next election. It does not instill confidence in me of his abilities to make hard decisions when leading a country."
Totally agreement. The key thing here is If the Tories get themselves together they will be bringing a Statutory Instrument to amend the Equality Act to mention biology as Sex Matters suggested. It is easily doable in the next year. That means a Parliamentary vote.
https://sex-matters.org/wp-content/uploads/2023/03/Briefing-for-MPs-on-the-Equality-Act-amendment.pdf
This will be a crucial moment. I think Labour will not oppose this. Because it is in their interest to have it settled by the Tories as you say. Then they can simply avoid dealing with it. Which is Starmer's preferred position. It puts them in a difficult position but I bet they will opt to abstain.
However how MPs react will be interesting. Who wants to go on record voting against biological sex? Some of the most left wing Labour, maybe, but even for them it is going to be a difficult call. Obviously Rosie will be voting for it and poss other Labour MPs too.
More to the point for the Tories it is a great wedge issue. If most Labour MPs abstain they can point at them and say Labour is still confused about biology. Even better this is a HUGE problem for the Lib Dems and the SNP. The Tories have a bunch of seats under threat there and the Lib dems are really divided. Likewise it could reignite more internal battles in the SNP and the Tories think they can actually make gains in rural Scotland.
If the Tories do this right they will aim to have the vote as close to the election as possible then sit back as other parties have huge infights and then trigger them all over again during the campaign. When the economy is so bad knowing what a woman is one of the best tactics they have.