About 25 mm across the cap... growing in grass where a large leaf-pile used to be, adjacent to a wooded area.
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.
Looking at your second photo, where the underside of the cap can be clearly seen I would say this is not C. plicatilis, which has a distinct collar around the stipe. There are several similar species though, and I wouldn't want to guess at it. I'd leave it at Parasola.
Lat/Lng: 52.0, 1.1
OS grid ref: TM1645