That report from Norway is horrifying. The verdict was in favour of the woman, but the fact that some of the people ruling on the case thought that the woman was guilty of harrassment is appalling.
And I wonder if this is actually true in Norway:
Women who are trans experience harassment and violence from men at a much higher rate than women who are cis, and have the same need for a changing room where they can feel safe.
Nowhere in that report was any consideration shown for a woman who did not want to share a communal shower with a transwoman with a penis.
The remark that “she is provoked by seeing a penis in the changing room” can be interpreted as being directed at B and not the changing room set up. It’s a remark that could be considered offensive.
So a transwoman can be offended by someone being offended by her penis, but a woman is not supposed to be offended by the presence of said penis in the women's changing room.
Interesting that Norway's equalities legislation seems to be as much of a mess as the UK's.
Use of changing rooms for persons who have changed legal sex is a question which has not been given a legal clarification.