I too suffer from bowel problems, and like so many plan my journeys accordingly, or curtail them, or don’t go out at all.
I would like to add to the discussion about shops making their staff facilities available for those who have an urgent need.
I worked in both large and small retail premises, the smallest having only 2 staff on duty when open.
Lathyrus3 is quite correct about insurance and liability, and as for having to ask permission of another,Silverbrooks, in my experience it wasn’t permission, it was letting the other person know what was happening as one couldn’t just leave the shop floor.
Sounds simple, but in the small unit if that other person was upstairs (where the loos were, next to the staff lockers) I’d wait for them to answer the phone, tell them a customer was on their way, send the customer upstairs where my colleague would be waiting for them, all the while keeping an eye on the shop to make sure no-one needs help or worse is stealing.
It shouldn’t need to be up to shops to let customers use their staff loos, there should be sufficient public ones.