Update 10 days after my OP:
Who would have thought that volunteers were so unappreciated? Everybody wants donations 
but no one wants me to actually show-up 
That’s a shame. Have you offered to foster cats in your house? There is often a huge need for that service.
Thanks @Lassie but alas that’s not possible for us because of tenancy rules.
You know, I wonder why I stay on where I am. A resident once reported that someone had the audacity to have a visiting dog in the gardens with them 