My daughter (39 and a doctor), gathered emails/phone numbers for everyone in her street (lots over 70) saying folk could email the group if they needed help and some of the younger/fitter ones would get shopping, prescriptions etc.
When we had gone over to drop off something my daughter needed (a few weeks ago), we had just dropped the stuff off on her doorstep and got back in the car when a gentleman in his eighties came along. He went and knocked on my daughter's door. As she was out, I got out the car and called over to ask if I could help.
He said he was from 3 doors up and had got her message, but he wouldn't be able to help to get shopping as he didn't keep very well and was just letting her know.
When I explained it was to provide a means for anyone in the street to get help, not just for those who were able to give the help , he looked so relieved and his face broke into a huge smile. He was very grateful!