I live in the UK. I use the “Radar Key Scheme” for both my son and myself. The Radar Key opens handicapped toilets around the country that are otherwise locked. I asked my GP about a referral for this and they knew nothing about it. In the end I just bought one online. Bizarre. I have a disability that’s not visible, I’m otherwise healthy and relatively privileged, but being unable to find a toilet to use when my bladder feels like it is going to explode makes me feel like a wild animal - unable to fulfill the most base need in a culturally acceptable way - terrible feeling.