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The Dryopteris affinis complex is apomictic and several entities exist. Latest treatment (Stace 3) is to recocnise three species with additional subspecies, a classification that works for my area!
The photograph does appear to be true D. affinis, but note that D. borreri and D. cambrensis, until recently included under D. affinis, are now separate species.
Lat/Lng: 50.858, -3.2841
OS grid ref: ST097072