Comma butterfly sunbathing

A very warm Sunday afternoon and I spotted this comma butterfly sunning itself on our flint wall.

The reason its called a comma is the small white comma shaped mark on the underside of its wings, but it looks a bit like a tatty battered tortoiseshell.

This butterfly overwinters as an adult and must build up their fat reserves to survive the winter. Idea site includes underneath the bark or a tree truck, log pile or maybe a garden shed.
tree trunk, log piles.