unidentified garden fungus

unidentified garden fungus

Observation - unidentified garden fungus - UK and Ireland. Description: This large fruiting fungus appeared in our flower bed on a rotting willow stump. Unfortunately I know precious little about fungi so would really appreciate some help in identifying this to genus level at least. Those are bamboo poles next to the fungus

This large fruiting fungus appeared in our flower bed on a rotting willow stump. Unfortunately I know precious little about fungi so would really appreciate some help in identifying this to genus level at least.
Those are bamboo poles next to the fungus for a sense of scale