Sulphur tuft
Sulphur-yellow clusters on stumps, very bitter. Toxic and easily confused with edible species, so take care.
Hypholoma fasciculare
toxic
A wood-decay fungus that breaks down wood – found on stumps, trunks and branches in the forests of Czechia and Slovakia.
Edibility: Toxic – do not eat. Worth knowing so you can tell it apart from edible species.