We have unisex toilets in the Maths department. I think its mainly due to a lack of space, but it works well for us. The concept of unisex toilets doesnt worry me, however I agree with Judith (and Claire) about this. I would personally feel uncomfortable. Although many people would value from these toilets, I would worry about men claiming to identify as female (when they don’t) just so that can go into bathrooms with females. I also worry about this the other way round! However, like Claire, I believe Judith worded that better than me.