Oyster mushrooms

Oyster mushrooms

Observation - Oyster mushrooms - UK and Ireland. Description: Pair of very pallid Pleurotus caps emerging from scar hole on unidentified (and unlabelled) deciduou

Pair of very pallid Pleurotus caps emerging from scar hole on unidentified (and unlabelled) deciduous tree.
White throughout
Largest cap around 20 cm with finely scaled upper surface (see last 2 pics)
Initially id'd to species in the field by Jason - thanks.