It's not just orchids flowering in the grass that attracts one's attention. This little plant is called Milkwort Polygala spp, and likes the same habitat as many of the orchids in the Claise Valley i.e. dry banks of short grass.
It's called milkwort because it was believed that if cows grazed it they would produce more milk. This is probably an example of sympathetic magic, as the inner part of the flower is fringed, perhaps invoking an udder.