I am visiting from overseas (am British, but a long-term overseas resident), and am continually flummoxed by the lack of baby-holder seats in the toilets! I am talking about this kind of thing here.
www.combiwith.co.jp/english/toilet/bk_f72.html
They are used to put babies and toddlers (up to age 2) in while you pee, poo, change sanpro and pull your clothing up etc.. Keeps them clean and in one place. They take up very little space and can fit into even very small cubicles.
Back in this country, I am SICK of the fact that I so often face a choice between taking up space in a disabled loo, or trying to pull my jeans up while holding a baby and trying not to drop her or bang her head on something. Or putting the baby on the floor (!?). And trying to stop her pulling things out of the sanitary bin etc. It seems dangerous and unhygienic. Occasionally a regular (non-disabled cubicle has a changing table, but most babies hate being left to lie on them, flat on their backs, while you pee, and mine tries to wriggle out of the crappy unsubstantial harness, which seems so unsafe. And sometimes the changing table pulls down over the loo, so it can't be used while you are peeing.
Given all the discussions I have seen on MN about parents using disabled loos because they are the only ones that you can get a pram inside (and are often the only ones with changing tables), I can't help feeling that this would be a space-efficient way to help parents and make things safer for babies, while ensuring that disabled loos can be prioritized for disabled customers...?