Common inkcap mushrooms grow on buried dead wood or tree stumps, here in one of the front gardens on Richmond Road. The fruiting bodies can occur any time from spring to autumn.
Edible, but if you are thinking of trying them, make sure to avoid any alcohol for at least two or three days before and afterwards, or expect a series of unpleasant and possibly dangerous symptoms. Its effects are similar to the drug antabuse, used (less often than formerly) to give alcoholics an aversion to drinking.