Like a large broken egg. About 15 to 20 cm long.
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.
When I found something similar I thought it might have been an old wasp nest or maybe a cup fungus until it was ID's as H. utriformis!
"Eventually, all that remains is the sterile cup-shaped base, which can sometimes hold water. This feature may have been the source of the specific epithet, as utrarius is Latin for ‘water carrier’." See http://eol.org/pages/11456525/details.
Lat/Lng: 50.671, -2.0495
OS grid ref: SY965857