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.
It would help with ID to note the size and whether or not the cap had a peelable covering. Having said that I agree that it MIGHT be C applanatus...
Lat/Lng: 51.5, -3.2
OS grid ref: ST2079