Bracket fungus

Bracket fungus

Observation - Bracket fungus. Description: Bracket fungus, about 5 inches across and similar thickness. Rounded in shape and knobbly on top, difficult to tell where the underside (pores) and the rim meet, but there seemed to be a whitish rim on the two specimens observed. One group growing about

Bracket fungus, about 5 inches across and similar thickness. Rounded in shape and knobbly on top, difficult to tell where the underside (pores) and the rim meet, but there seemed to be a whitish rim on the two specimens observed. One group growing about two foot and the other (single specimen) about one foot up from the base of a horse chestnut tree. Hard and cork like to touch. Is anyone able to help with identification please?