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Did you get a specimen? This one looks very like N. fabriciana (2nd brood) rather than N. obtusifrons to me. However, It really isn't possible to be certain from this pic though.
N. obtusifrons would be a real coup!
Have you been in touch with Brian & Stephanie Little of Fife. They are the local gurus and would be very interested in your record
Lat/Lng: 56.22, -3.304
OS grid ref: NO192038