Fungi around base of tree

Fungi around base of tree

Observation - Fungi around base of tree - UK and Ireland. Description: This fungi was found growing in an impressive formation around the base of a tree (which itself seems fine). This location is particularly damp this time of year. Indeed, stick an adventurous boot on to the grass here and it will disappear in a vacuum o

This fungi was found growing in an impressive formation around the base of a tree (which itself seems fine). This location is particularly damp this time of year. Indeed, stick an adventurous boot on to the grass here and it will disappear in a vacuum of mud fairly easily.

Edit: thank you for the ID, I've added a couple of extra photos if they help.