I guess the false 'eyes' served their purpose and were pecked out by a bird?
No interactions present.
I've seen many seriously "hen-pecked" butterflies this summer. I don't know whether this is the result of generally low insect numbers, causing the birds to try anything when they're hungry.
Lat/Lng: 51.625, -1.105
OS grid ref: SU620921
On buddleja in garden