These parasol mushrooms were growing in a small troop in a corner of our friends, Matthew and Tonia’s, back garden in Ossett, who’ve recently cut back shrubs to rejuvenate a shady bed by an old stone wall.
I remember that back, in the 1980s, Matthew attempted to remove the large stump of what I think had been a diseased elm from this corner, but in the end he had to bury it and leave it where it was, so these could be fungi associated with rotting wood.
To me it looks like one of the agarics, some of which are good to eat, others deadly poisonous. I should have taken a closer look at the gills.