DaisyAnneReturns
You are probably best with a standard care system. The button around her neck that Tenko mentions would be connected to the operator, usually through the phone system. The phone has a speaker.
If your mother presses it, they will speak to her through the system to find out what the problem is. If she is not able to answer, they will call the emergency services and let you know. They would want an up-to-date copy of your mother's medical conditions and medication. If she lives in a building with a code entry, they will need that too for any of the emergency services should they be needed.
They will also need a key to her accessible door. If you choose to be her key holder or someone else is nominated they must be available 24 hours a day and to be able to get to your mother quickly. All in all, I would recommend a key safe rather than a nominated key holder. If this is chosen, the service provider will also need the code for the key safe.
To keep in touch with you, your mother could have an Echo Show. I believe you could set it up so she can say, "Alexa, send a message to bobble to say I am up and having my breakfast". There is also a drop-in facility between devices (you would also need one for this). If your mother gives permission, you can do just that. Your mother may not want that at the moment, but you can send a phone message asking if you could "drop in on Alexa for a chat". Then, if things deteriorate, she may be happy for you to look in and see if she is okay.
I think a Care Line system is more of a priority, but it all needs her agreement.
thank you - the echo show looks like a good possibility for me - I really appreciate your thoughtful response


He is aware of his multiple issues so that makes it easier.