Womble,
Thanks for the info about Jam Jar.
I phoned to find out more about it. Depending of the amount that was brought in you either got a voucher or a slice of cake.
Went along to the allotment first thing this morning and pulled most of what was left of the beetroot and a couple or four onions and took them along.
Was welcomed enthusiastically, the chef appeared and took the veg back to the kitchen to weight it and Richard, the manager, came back with an offer that bowled me over.
So now have a money off voucher when I was expecting a slice of cake.