Small, delicate flowers. Found in garden.
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The petals of wild raddish should be much thinner, giving the appearance of a 4-bladed propeller.
the leaves should be like celery - large lobe at end, smaller leaflets down the stem.
This looks more like one of the many cruciferae/brassicaceae known as cress and bittercress.
Much too small for a Radish
Wild Flower Society member
I've now edited the identification, based on comments from other users (thanks) and I checked it up in a book I'd temporarily misplaced.
Looks like 6 to me, albeit v blurry - appearance is v much C flex.
Lat/Lng: 52.7, 0.3
OS grid ref: TF5820