Common law states the people of britain can collect follage fungi, fruit and flowers for personal consumption from land you have the right to be on. So I can pick mushrooms from the local country park, but selling them on isn't. However no body will proscute the lady that collects bilberries from mowcop and sells the jam on the farm that borders the moor, but the mushroom pickers of epping do get stopped and occasionalt prosecuted. The differance is how damaging their habits are, the mowcop lady it is in her best interest not over harvest, she even throws the uncooked seeds back.
It gets down at which point the micheal is really been taken. The thing is it a liberty that when taken is taken off everyone. My nearest beach has no cockles, the population collapsed 10 years ago, in fact it doesn't have much sign of razor clams either so i am not sure over harvesting is the whole story.
a grey zone is that if I take money to show costumers wild foods, is it comercial foraging.