Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Agaricus augustus has a large membranous superior ring.
From looking at the image showing the stem, it looks as if the membranous ring has come off the stem, as a membranous film is visible on the grass.
Could be :0
Lat/Lng: 51.8, 1.0
OS grid ref: TM1118