Found on a boulder, near a stream, in woodland.
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.
Is there any simple test or examination that would allow me to identify this further, or is it not really something an amateur should concern themselves with?
If you read Alan Silverside's page (link below) concerning C. chlorophaea agg you'll get a better idea of the situation:
Lat/Lng: 54.2902525, -0.4125944
OS grid ref: TA034894