That is an excellent letter. How wonderful to see so many people feeling able to stand up and state things like this:
We also believe that sex is biological, and (in humans) immutable: we do not believe that it is possible for a human being literally to change sex. We think it self-evident that biological sex has material consequences. We think there are circumstances in which it is necessary to draw distinctions between (natal) women and trans women .
It is indeed a good week.