Pestle shaped puff-ball growing on and around stumps in mixed woodland.
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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I considered Lycoperdon pyriforme but have always thought that species to be more clumping in habit and it also appeared to be growing on the ground as well as the stump, although it could have been a buried one.
I am still not convinced that this is right but I came across a specimen today which looked to be growing from a stump and is a carbon copy of your second photo and with spiny spores is definitely not L pyriforme.
Lat/Lng: 50.7, -1.3
OS grid ref: SZ5292