PS I did not damage the plant, these were already as shot!
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 might be Macrolepiota mastoidea but not sure. The papillate cap makes me think of that possibility.
Lat/Lng: 52.0945, 1.3414
OS grid ref: TM289492