Coenonympha tullia - Large Heath
It took me a long time to find this species, ironically, in the end, not far from my home. All the lower photos except the bottom one are from this site. They are form polydama an intermediate between south and north in the UK. The butterflies are quite variable, and one shows interesting lanceolate eye spots.
I have yet to see this species in mainland Europe, but have seen the North American variety in Canada, this had no spotting whatsoever.
It's boggy habitat makes for a challenge in achieving a decent butterfly photograph, often at the cost of sodden clothing.
The photograph below was taken near Aviemore in Scotland, and is of almost the scotica form. The eyespots are lessened, sometimes absent, but the one below does feature them, but less so than those above.