I have recently made plum, damson, blackberry and elder jam, crab apple jelly etc...so i guess thats food from the wild ( apart from the amount i have spent on jam jars and preserving sugar haha)
I have mabeys book too but always forget to try stuff before its gone over and vanished...i have so many nettles i could make enough soup to last a lifetime if i could just have that thought before June
Oh i did harvest a fair few cobbs/hazel nutts this year before the tree rats had them all.