Phylum: Basidiomycota Family: Russulaceae
Russula nobilis Velen.
Beechwood Sickener
Very common and widespread under mature Beech Fagus sylvaticus trees
References:
Kibby (2009) The Genus Russula in Great Britain
Breitenbach & Kranzlin (2005) Fungi of Switzerland, Volume 6, Russulaceae
Overall (2017) Fungi: Mushroom & Toadstools of parks, gardens, heaths and woodlands