@Shortshriftandlethal
It is actually grassroots women's groups in the UK that have been 'financing' the movement....courtesy of crowd-funding for court cases.
The Women's movement here is leading the way.....and it is actually the U.S which follows, albeit very incrementally, because the situation is so extreme and so well funded there.
I agree that the UK is leading the way, for many of the reasons you mention. I think the For Women Scotland case strikes the correct balance between women's and trans' rights. It's brilliant. Women owe a huge debt to Susan, Trina, Marion, JKR, everyone who helped crowdfund the case, and all those involved.
This may be tangential but it's key to understanding US politics and I think it's generally overlooked on Mumsnet. The USA will rarely be at the forefront of anything bc it's a federal system with fifty separate state governments that each have a lot of power to make and enforce laws. Almost always, the law on any given subject will be quite different in different states, though there are commonalities (e.g.all outlaw murder, all have adopted the Uniform Commercial Code). The UK has a unitary system with some devolved powers but those powers are weaker than the powers each of the fifty states retains under the US federal system. Plus Parliament can always withdraw devolved powers whereas the Tenth Amendment to the US Constitution says
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
Having a Parliamentary system as opposed to the separation of powers in the US also makes it easier to pass legislation. Some US cities or states may be occasionally be a world leader in specific legislation but those tend to be Democratic (US party) states like California, New York, or Vermont and, on this issue, the Democrats are firmly on the side of trans rights over women's rights.
Terf Island leads the way on this issue.