Phylum: Basidiomycota Family: Stereaceae
Aleurodiscus aurantius (Pers.) J. Schröt.
Briar Discus
Widespread and common, usually found on members of the Rosaceae, hence the name, but also on old heather stems
References:
Bernicchia & Gorjon (2010) Fungi Europaei 12: Corticiaceae s.l.
Hugill & Lucas (2019) The Resupinates of Hampshire