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.
gets my vote here. While the plate-like fruit bodies are coalescing, they are not forming the folded mass I recognise as E. plana/nigricans. Just a stray thought; I haven't studied this genus.
This is almost certainly E.glandulosa given the appearence of 'warts' on the flattened top surface. As Nigel mentioned E.nigricans(formally plana)quickly becomes distorted from the classic button top shape into an amorphous mass.
All given ID's are subject to error/ommissions. Please seek independent verification before acting on ANY advice given. BE SAFE =)
Only two species I know that can not be seperated by microscopic details. So without DNA your left with tree type and general appearence to determine.
Thanks for the clarification, I had based my ID on the fruiting bodies joining, so it is good to hear about the warty surface being another distinguishing feature for this species pair.
Also E.glandulosa only occurs on Oak and Hazel, similar finds on any other tree types will not be E.glandulosa.
Lat/Lng: 52.62082, 1.32719
OS grid ref: TG253077