A recent visit to the local council stated that a radar key was available for purchase from them for a few pounds, which allowed one to access any disable toilet in the community. This I thought was a great idea especially when out and about with your loved one.
If you are registered disabled as well as having alzheimer’s disease then if you produce the relevent documentation to state that you are registered disabled then the key was free.
Good luck.
This information was correct as at September 2011