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Probably H. axy. f.conspicua, I cannot tell if rear mark is a reflection or a spot.
I'm afraid that I cannot help with any other photographs as I only got one and why I only got the one? I'm beggared if I can remember.
If it was a spot rather than a reflection then it would be a Harmonia axy f.spectabilis.
Lat/Lng: 51.503, -0.18
OS grid ref: TQ264797