Another point for mushrooms is that it’s really important not to ‘uproot’ the whole mushroom from under the soil as it won’t grow again. Instead cut the mushroom stalk above ground.
Next, ask owner’s permission first when foraging on private land, National Trust property or nature reserves. If you’re foraging on common land, you’re allowed to take the four F’s for your own personal use: fruit, fungus, foliage and flowers.
There are often local Bylaws regulating what you can and can’t pick. So, always check on Park and Local Authority websites first and any signs that may be displayed in local parks.
Avoid Sites of Special Scientific Interest (SSSI) which are areas of land in the UK listed for a particular reason. For example, they may host a rare butterfly and you might unknowingly do damage to the site by, picking something that might be food for the butterfly or its caterpillars.