Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
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Does Bulgaria inquinans have warts on its upper surface in some cases, as here?
It does on this one;) I have agreed with the id for Bulgaria more because of the granular surface on the outside of the cup.
I was comparing it with pic 2 here, which has a similar underside:
I should stick to lichens!
Edit: It does appear cupulate, but I have now read several accounts (eg Roger Phillips) of only E. glandulosa having pimples, so I'm bravely going against the grain here.
There is nothing wrong with going against the grain. From the description in Phillips it does make it seem more likely but to me it just look "wrong". One of the reasons comming up with id's from pictures is fraught with problems and 30 seconds with a microscope or even a finger over the damp surface to get a spore colour would solve the problem.
Bulgaria spores black
Exidia spores white
that would be a neat solution.
The white spores often don't show but the black gives an instant id.
Lat/Lng: 51.006, -2.9352
OS grid ref: ST344233