Wingspan 22 mm
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For me this is a tricky one. Some others with more experience of differentiating between the Wave species will hopefully contribute. You might well be right- what about a Mullein wave (its not one I know well personally but just looking at pics in Waring, maybe too big).
The ragged crossline on the hindwings striking, the other waves seem to have gentler crosslines?
Lat/Lng: 45.967625, 7.9293433333333