I don't know, Hope. We pay Council Tax, some pay a lot. Surely loos can be maintained out of that alongside other things.
Some public lavatories - the kind that look like space capsules and you wonder, if you can get in, will you be able to get out - do have a coin slot. I don't know if they are council or privately owned.
Most department stores and supermarkets have such facilities now, quite free. I understand that McDonalds allow anyone to use their loo regardless of whether of whether or not they are customers.
I daresay the abundance of toilets in shops and restaurants is why council ones are being closed, they are not used as much and not as nice and clean as the ones in Sainsbury's.
However I worry about someone suddenly taken short and not having the right change, a nightmare scenario.