A Bucks blue

During the night of 17 September 2015  Alan and Juliet Gudge at Frieth had a Clifden Nonpareil (Catocala fraxini) to their garden moth light.  The slight delay in reporting this is because Alan wanted to check that a local butterfly breeder, who also releases, hadn't reared any Clifden Nonpareils.  Luckily it turns out that they don't breed moths.

I believe this to be the fifth Bucks record.  The first was at what is now Cliveden Estate (formerly Clifden) near Taplow in the 1700s and supposedly the first British record.  The next three were from 2013 &14 at Dinton and Princes Risborough in 2013 and Turville Heath in 2014.  These three and the Frieth one are all within a circle of approximately 10km diameter.  Could they be established locally?

Thanks to Alan for supplying the information and picture