I got canvassed the other day by a very nice Lib Dem candidate - first thing I asked was "What is a woman?" and explained that although I would normally be open to voting Lib Dem, who are pretty good locally, their record on this issue was appalling and I'd be spoiling my ballot paper. He looked a bit nonplussed and claimed ignorance, explaining that he was more engaged in local issues - which I felt was simultaneously understandable and frustrating! So I said I sympathised but I was a single issue voter, wished him the best of luck but asked him to report back to the party that it had come up on the doorstep and was losing them votes.
I was extremely surprised when this morning he came back to my house with a letter for me, explaining that, since telling me he didn't know much about it, he had looked into the issues and this was his response - but broadly summarised, he was supportive of everyone's rights to live as they wished unless and until that conflicted with anyone else's rights (at which I nodded and said, "Exactly!").
To nitpick, I think his position isn't quite the ringing endorsement of women's rights that I'd dream of, and some of the details are wrong (eg conflation of the Equality Act and the GRA), but it contains a clear acknowledgment of the need for single-sex spaces, and he also includes a statement from the Liberal Voice for Women which says (among other things) that Ed Davey has admitted that gender is a belief and not a fact. Basically, from someone who hadn't thought about it before, I found it very heartening. In fact I venture to hope that I may have peaked piqued his interest in the question...