Public toilets

Hi my name is Kirsty and I have a daughter called Heidi she is 11 years old and has cerebral palsy she is a clever little girl and is in mainstream school  Heidi is able to use the toilet with assistance from a hoist as she is getting older I am really struggling to left her when out in public as not many places have hoists, I am really starting to lose the will why arent they mandatory she has a right to use the toilet as much as anybody else I feel nobody is listening to me and am scared she will soon become isolated as there will be a point I  an no longer lift. Please any advice would be great also I do have a portable hoist but is a heavy piece of equipment to take out by myself and 90 percent of the time the bathroom has been too small to fit in ?