pink flower as part of cornfield weed seed mix
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This one has beaten me, but I though that the stem leaves were wrong for Malcolmia maritima.
The lack of basal leaves and mature fruits hinders identification, but it might be Raphanus sativus.
...suggests that cornfield wildflower mixes contain Malcolmia more often than they contain Raphanus.
Not exactly botanical evidence, though!
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
... often enough turns up on disturbed ground, such as occurs during preparation for sowing cornfield mixes.
I have a suspicion that its not Malcomia or Raphanus. Will try to contact the people who planted the area to see if they can find out what the seed mix cocntained.
Lat/Lng: 52.024208055556, -0.71895194444444
OS grid ref: SP879369