Polygonum c-album

So I saw the album and bought it...now I can identify all the butterflies I'm likely to see.....
It's a comma...and in this shot you can see the white comma on the underside of the wing.....
Had two lovely walks with Brodie today...one on Longash...before breakfast...and the pre -tea and cake one down to Double Waters....this fella was waiting by the car when I was on my last breath and looking forward to going home....he posed for ages.....