Without experience beyond awareness of the requirements of Country Markets, I would suggest that you speak with the Environmental Health Officer for your District Council. It would be simplest if your distribution is within one authority, else you will find differing hoops to jump through!
There clearly is a potential for a problem to be hypothocised, liabilty in this day would spoil your good intentions.
I would be interested to learn how you determine who would qualify for your benefactions, I have in mind the problems that befell the Harvest- giving distribution of a local church, with a 'fall out' from a few of those who were excluded and also some of those who were included (and felt patronized! )
Good Luck.
AF