I have run in a lot of local places until recently and know along my routes where the best blackberries, cherries, plums, etc are. Where I grew up in Kent, the same thing, especially that secret row of Damson trees near to where we used to live and of course loads of apples and pears. I nearly forgot to mention the cob nut trees, walnuts, and other nuts which I discovered when on school holidays or when I was playing truant. I'm sure they are still there and just waiting for a loving human to pick them.
I also wonder if there will be a 2020 surge in homemade beer and winemaking again?