Coordinates: 50°27’07,38" N 1°38’34,17" E
Slightly east of Le Bout De Haut
Also this a bit further south
Could those be shallow pans to grow/collect sea salt?
They dont seem to hold water really or even be connected to water at all.
If you notice, the first picture in the post comment, shows the same location slightly zoomed out. There you may notice some larger areas that seem like ponds. But the smaller patches seem to be just cleared earth patches