Thank you - just looking at images on Google and it does look like it's that one. I have a few clumps of the ones below too springing up in different spots - the markings look the same but the flower and the leaves are much smaller (which probably confirms the above as the giant one?)
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When you don't even know who's in the team
S.Yorkshire/Derbyshire border
This is common as muck [ but rather beautiful anyway ] G.nivalis
When you don't even know who's in the team
S.Yorkshire/Derbyshire border