Winter / Northern Winter Moth (Operophtera brumata/fagata)

Winter / Northern Winter Moth (Operophtera brumata/fagata)

Observation - Winter / Northern Winter Moth (Operophtera brumata/fagata) - UK and Ireland. Description: I found this on a Silver Birch trunk in the garden. I've no idea what it is. Can anyone help, please? Edit: Changed to match DD's ID. Many thanks.

I found this on a Silver Birch trunk in the garden. I've no idea what it is. Can anyone help, please?
Edit: Changed to match DD's ID. Many thanks.