Phylum: Basidiomycota Family: Schizoporaceae
Xylodon pruni (Lasch) Hjortstam & Ryvarden
It would seem to be quite rare, reported on dead wood of Salix species and conifers
References:
Hugill & Lucas (2019) The Resupinates of Hampshire
Eriksson, et al. (1973-87) The Corticiaceae of North Europe, Volumes 1-8