Very wet meadow.
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... haven't heard this called Milkmaids, though.
I would have thought the flowers were a bit too pinky to be milky.. unless they meant that the milkmaid had healthy pink cheeks?
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Not sure why, but this was the name I was taught when I was young, in the North-East.
I heard it was in reference to the shape of a traditional milk maid's dress.
It's called milkmaids locally.
Lat/Lng: 52.572005555556, -0.651725
OS grid ref: SP914979