I volunteer for the Nspcc schools service and we were at a conference with Esther Rantzen yesterday . Esther also spoke a little about Silverline. She was very enthusiastic and said the calls are increasing every week. There was a jump in the number of calls over the Christmas period from people who were alone so they probably need all the help they can get 
Recommendations for a plant identifier app that is free


I was put off, though, by the fact that it appears you ring the people from your own home.