Wings up showing underside

Descrission:

Longitude (deg): -4.2. Latitude (deg): 50.5. Longitude (deg/min): 4° 20' W. Latitude (deg/min): 50° 30' N. Vice county name: East Cornwall. Vice county no.: 2. Country: England. Stage: Imago. Associated species: Centaurea nigra. Identified by: Malcolm Storey. Comment: feeding on Knapweed. Category: standard photograph or close-up. Photographic equipment used: Canon EOS400D dSLR with Tamron SP AF Di 90mm Macro 1:1 lens.