Okay, let's see if I can get this one not eliminated.
This spring we will be taking the local version of the Bernina Express, from Zurich through to Tirano, and then on to Varenna. I need to know in advance whether the Swiss local train cars have a WC somewhere on them. Reason? I take a daily diuretic because of my cardiac amyloidosis, which means I have to allow upwards of 4 hours after where I need repeated "access." I have some flexibility during the day as to when I can take it, although 3 hours before sleep is not an option. So I need to know how best to account for this need that day, and the surrounding two days, hence the info on the trains. This is not an answer I have been able to find yet, and taking the trip on the fancy actual BE is not an option.