Butterfly

Despite having these plants that are supposed to attract Butterflies (Buddleia) we only really get them see through butterflies that I have recently captured on here.
Today though I got a brief glimpse of this one (anyone know the species?).
And very brief it was too. I only had my 'secondary' camera to hand so not the macro lens I like to use, and the background is kind of cluttered but not too bad a capture.
I did try turning the purple leaves white in Lightroom, but it looked a bit odd!