Britannic chionophilous boreo-montane heaths

Low- to very low-growing low alpine and subalpine [Vaccinium myrtillus] heaths of the Highlands of Scotland, Skye, and, locally, the Southern Uplands and northern England, characteristic of somewhat more protected stations with longer snow cover than those of unit 31.451, with [Empetrum hermaphroditum], [Vaccinium vitis-idaea], [Rubus chamaemorus], [Cornus suecica], [Carex bigelowii], [Racomitrium lanuginosum].