Thanks for your really quick reply. I never thought of a moth. They are on the verbascum as well in the garden, nowhere else. They are being harassed by swarms of bees. I have a photinia bush. Every June it produces tiny white flowers, it smells like warm cat piddle (or what you'd imagine warm cat p...

I know this is probably a well-known butterfly in its caterpillar form but I haven't seen any before. My husband was ill last year so I neglected some of the garden. These were in the neglected patch.